# ADI Leak Detection case studies: water mains and supply pipe leaks, part 1 of 3

60 jobs carried out by ADI Leak Detection engineers, taken from ADI's own job records and written as semantic triples, most recently added first. Each job has a heading, a short summary and triples in the form subject | predicate | object. What each predicate means is explained at https://leakdetectionbirmingham.com/case-studies.md

## ADI Leak Detection case study 335: underground water mains leak in Marlborough (SN8 3)

Summary: ADI Leak Detection engineer Artur Sowa investigated an underground water mains leak in Marlborough, Wiltshire (SN8 3), using acoustic correlation, pressure testing and visual inspection. Leak location: between the second meter and the valve inside the gas box. Work done: outlet fitting replaced, new tee junction installed and new elbows fitted. Outcome: hole backfilled with a safety cover left in place.

- ADI case study 335 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 335 | town | Marlborough
- ADI case study 335 | postcode sector | SN8 3
- ADI case study 335 | county | Wiltshire
- ADI case study 335 | country | England
- ADI case study 335 | leak type | Underground water mains leak
- ADI case study 335 | service | Water Mains Leak Detection
- ADI case study 335 | service | Underground Leak Detection
- ADI case study 335 | engineer | Artur Sowa
- ADI case study 335 | detection method | Acoustic Correlation
- ADI case study 335 | detection method | Pressure Testing
- ADI case study 335 | detection method | Visual Inspection
- ADI case study 335 | symptom | flooded basement
- ADI case study 335 | test result | pressure test and acoustic device confirmed a leak
- ADI case study 335 | leak location | between the second meter and the valve inside the gas box
- ADI case study 335 | leak location | outlet fitting from the meter box
- ADI case study 335 | leak cause | broken outlet fitting
- ADI case study 335 | access made | hole excavated
- ADI case study 335 | repair | outlet fitting replaced, new tee junction installed and new elbows fitted
- ADI case study 335 | repair | Philmac 25mm tee and joiner, Plasson 25mm elbow, MDPE 25mm pipe, Floplast 25mm male adaptor
- ADI case study 335 | outcome | hole backfilled with a safety cover left in place

## ADI Leak Detection case study 334: underground water mains leak in Aylesbury (HP14 3)

Summary: ADI Leak Detection engineer Artur Sowa investigated an underground water mains leak in Aylesbury, Buckinghamshire (HP14 3), using acoustic correlation, tracer gas and visual inspection. Leak location: 20mm metal pipe beneath the block paving. Work done: leak repaired with 20mm MDPE pipe and two 25mm to 20mm fittings. Outcome: pipework re-tested after the repair to confirm no further gas escapes.

- ADI case study 334 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 334 | town | Aylesbury
- ADI case study 334 | postcode sector | HP14 3
- ADI case study 334 | county | Buckinghamshire
- ADI case study 334 | country | England
- ADI case study 334 | leak type | Underground water mains leak
- ADI case study 334 | service | Water Mains Leak Detection
- ADI case study 334 | service | Underground Leak Detection
- ADI case study 334 | engineer | Artur Sowa
- ADI case study 334 | detection method | Acoustic Correlation
- ADI case study 334 | detection method | Tracer Gas
- ADI case study 334 | detection method | Visual Inspection
- ADI case study 334 | symptom | no visible signs of dampness or structural damage
- ADI case study 334 | pipe material | 20mm metal
- ADI case study 334 | test result | strong acoustic reading in the middle of the driveway
- ADI case study 334 | test result | tracer gas escape in the area identified by the acoustic equipment
- ADI case study 334 | leak location | 20mm metal pipe beneath the block paving
- ADI case study 334 | access made | block paving removed and underlying area excavated
- ADI case study 334 | repair | leak repaired with 20mm MDPE pipe and two 25mm to 20mm fittings
- ADI case study 334 | outcome | pipework re-tested after the repair to confirm no further gas escapes
- ADI case study 334 | outcome | excavation backfilled and block paving reinstated

## ADI Leak Detection case study 333: underground water mains leak in Derby (DE23 4)

Summary: ADI Leak Detection engineer Phillip Whitehouse investigated an underground water mains leak in Derby, Derbyshire (DE23 4), using acoustic correlation, tracer gas, pressure testing and flow metering. Leak location: transfer couplers at the front of the property. Work done: transfer couplers replaced and new pipe section of original mains size installed. Outcome: retest at 3.3 bar dropped 0.01 bar over 8 minutes.

- ADI case study 333 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 333 | town | Derby
- ADI case study 333 | postcode sector | DE23 4
- ADI case study 333 | county | Derbyshire
- ADI case study 333 | country | England
- ADI case study 333 | leak type | Underground water mains leak
- ADI case study 333 | service | Water Mains Leak Detection
- ADI case study 333 | service | Underground Leak Detection
- ADI case study 333 | engineer | Phillip Whitehouse
- ADI case study 333 | detection method | Acoustic Correlation
- ADI case study 333 | detection method | Tracer Gas
- ADI case study 333 | detection method | Pressure Testing
- ADI case study 333 | detection method | Flow Metering
- ADI case study 333 | property type | semi-detached bungalow
- ADI case study 333 | symptom | unusually high water usage
- ADI case study 333 | test result | meter test confirmed a leak on the incoming mains supply
- ADI case study 333 | test result | incoming mains pipework unable to hold pressure
- ADI case study 333 | test result | tracer gas and acoustic results pointed to the front of the property
- ADI case study 333 | leak location | transfer couplers at the front of the property
- ADI case study 333 | leak cause | faulty transfer couplers
- ADI case study 333 | repair | transfer couplers replaced and new pipe section of original mains size installed
- ADI case study 333 | outcome | retest at 3.3 bar dropped 0.01 bar over 8 minutes
- ADI case study 333 | outcome | minor loss determined not to come from the newly repaired section
- ADI case study 333 | recommendation | contact the local water authority about the integrity of the main supply pipe

## ADI Leak Detection case study 331: underground water mains leak in Telford (TF3 1)

Summary: ADI Leak Detection engineer Phillip Whitehouse investigated an underground water mains leak in Telford, Shropshire (TF3 1), using pressure testing, tracer gas, acoustic correlation and visual inspection. Leak location: front of the house. Work done: burst section cut out and joined with 2 couplings and new MDPE pipe.

- ADI case study 331 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 331 | town | Telford
- ADI case study 331 | postcode sector | TF3 1
- ADI case study 331 | county | Shropshire
- ADI case study 331 | country | England
- ADI case study 331 | leak type | Underground water mains leak
- ADI case study 331 | service | Water Mains Leak Detection
- ADI case study 331 | service | Underground Leak Detection
- ADI case study 331 | engineer | Phillip Whitehouse
- ADI case study 331 | detection method | Pressure Testing
- ADI case study 331 | detection method | Tracer Gas
- ADI case study 331 | detection method | Acoustic Correlation
- ADI case study 331 | detection method | Visual Inspection
- ADI case study 331 | property type | semi-detached house
- ADI case study 331 | symptom | losing a lot of water from the water mains
- ADI case study 331 | test result | meter check with internal stop tap off confirmed a large leak on the incoming mains
- ADI case study 331 | test result | mains pipe tested to 3 bar lost pressure rapidly
- ADI case study 331 | test result | tracer gas results at the front of the house, area confirmed by acoustic testing
- ADI case study 331 | leak location | front of the house
- ADI case study 331 | leak cause | burst pipe
- ADI case study 331 | access made | hole dug and opened up more as the mains ran under a drainage pipe
- ADI case study 331 | repair | burst section cut out and joined with 2 couplings and new MDPE pipe
- ADI case study 331 | recommendation | have a new mains installed if any more problems arise

## ADI Leak Detection case study 328: internal cold mains leak in Gravesend (TN15 6)

Summary: ADI Leak Detection engineer Aaron Baker investigated an internal cold mains leak in Gravesend, Kent (TN15 6), using tracer gas, a damp meter, an endoscope camera, acoustic listening and pressure testing. Leak location: 15mm copper fitting in the corner between the sink unit and the wall. Work done: 2 soldered straight couplings and a press fit elbow used on the copper pipework. Outcome: no further issues identified on re-test.

- ADI case study 328 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 328 | town | Gravesend
- ADI case study 328 | postcode sector | TN15 6
- ADI case study 328 | county | Kent
- ADI case study 328 | country | England
- ADI case study 328 | leak type | Internal cold mains leak
- ADI case study 328 | service | Water Mains Leak Detection
- ADI case study 328 | service | Internal Leak Detection
- ADI case study 328 | engineer | Aaron Baker
- ADI case study 328 | detection method | Tracer Gas
- ADI case study 328 | detection method | Damp Meter
- ADI case study 328 | detection method | Endoscope Camera
- ADI case study 328 | detection method | Acoustic Listening
- ADI case study 328 | detection method | Pressure Testing
- ADI case study 328 | property type | detached bungalow
- ADI case study 328 | symptom | water meter constantly spinning
- ADI case study 328 | symptom | some moisture on the external wall by the walkway to the converted garage
- ADI case study 328 | symptom | a lot of moisture and sound of running water under the converted garage plinth
- ADI case study 328 | pipe material | copper
- ADI case study 328 | test result | noise and meter movement stopped when the internal stopcock was turned off
- ADI case study 328 | test result | elevated moisture readings on the converted garage floor
- ADI case study 328 | test result | endoscope showed water spraying in the corner between the sink unit and the wall
- ADI case study 328 | leak location | 15mm copper fitting in the corner between the sink unit and the wall
- ADI case study 328 | access made | sink unit and washing machine removed
- ADI case study 328 | access made | wall excavated
- ADI case study 328 | repair | 2 soldered straight couplings and a press fit elbow used on the copper pipework
- ADI case study 328 | outcome | no further issues identified on re-test
- ADI case study 328 | outcome | sink unit and washing machine reinstated
- ADI case study 328 | recommendation | dry out the converted garage area with a dehumidifier

## ADI Leak Detection case study 326: internal cold mains leak in Herne Bay (CT6 8)

Summary: ADI Leak Detection engineer Aaron Baker investigated an internal cold mains leak in Herne Bay, Kent (CT6 8), using an endoscope camera, tracer gas, a damp meter and pressure testing. Leak location: push-fit fitting beneath the tiled bathroom floor. Work done: affected section of pipe repaired. Outcome: no further pressure drops and no tracer gas detected across the property.

- ADI case study 326 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 326 | town | Herne Bay
- ADI case study 326 | postcode sector | CT6 8
- ADI case study 326 | county | Kent
- ADI case study 326 | country | England
- ADI case study 326 | leak type | Internal cold mains leak
- ADI case study 326 | service | Water Mains Leak Detection
- ADI case study 326 | service | Internal Leak Detection
- ADI case study 326 | engineer | Aaron Baker
- ADI case study 326 | detection method | Endoscope Camera
- ADI case study 326 | detection method | Tracer Gas
- ADI case study 326 | detection method | Damp Meter
- ADI case study 326 | detection method | Pressure Testing
- ADI case study 326 | property type | detached bungalow
- ADI case study 326 | symptom | no visible signs of damage in the property
- ADI case study 326 | pipe material | 3/4 inch copper
- ADI case study 326 | test result | water meter registered consumption once the supply was restored
- ADI case study 326 | leak location | push-fit fitting beneath the tiled bathroom floor
- ADI case study 326 | leak cause | pipework was 3/4 inch copper, not 22mm, so the fitting failed
- ADI case study 326 | access made | tiled bathroom floor excavated
- ADI case study 326 | repair | affected section of pipe repaired
- ADI case study 326 | repair | 22mm x 3/4 compression straight fitting and 22mm x 15mm push-fit straight coupler used
- ADI case study 326 | outcome | no further pressure drops and no tracer gas detected across the property
- ADI case study 326 | outcome | vanity unit and basin refitted and retested with no issues
- ADI case study 326 | recommendation | have the floor tiles re-grouted now the tiles are re-laid

## ADI Leak Detection case study 325: underground mains leak in Biggin Hill (TN16 3)

Summary: ADI Leak Detection engineer Aaron Baker investigated an underground mains leak in Biggin Hill, Greater London (TN16 3), using tracer gas, a damp meter, an endoscope camera, pressure testing and visual inspection. Leak location: external stop cock situated in the garage. Work done: leaking stop cock cut out and repaired with a universal transition coupling and 25mm fitting. Outcome: meter still moving after the repair, though a lot slower than before.

- ADI case study 325 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 325 | town | Biggin Hill
- ADI case study 325 | postcode sector | TN16 3
- ADI case study 325 | county | Greater London
- ADI case study 325 | country | England
- ADI case study 325 | leak type | Underground mains leak
- ADI case study 325 | service | Water Mains Leak Detection
- ADI case study 325 | service | Underground Leak Detection
- ADI case study 325 | engineer | Aaron Baker
- ADI case study 325 | detection method | Tracer Gas
- ADI case study 325 | detection method | Damp Meter
- ADI case study 325 | detection method | Endoscope Camera
- ADI case study 325 | detection method | Pressure Testing
- ADI case study 325 | detection method | Visual Inspection
- ADI case study 325 | property type | terraced building over 3 floors
- ADI case study 325 | symptom | issue with the water bill, told they are using a lot more water
- ADI case study 325 | symptom | water meter spinning
- ADI case study 325 | symptom | no internal water damage and no high damp meter readings
- ADI case study 325 | system affected | supply pipework from the internal stop cock back to the meter
- ADI case study 325 | test result | meter still ticking over with the internal stop cock turned off
- ADI case study 325 | test result | pressure kept dropping and tracer gas detected in the garage near a stop cock chamber
- ADI case study 325 | test result | tracer gas coming from the water meter chamber in the footpath
- ADI case study 325 | leak location | external stop cock situated in the garage
- ADI case study 325 | access made | garage concrete and the area below excavated
- ADI case study 325 | access made | block paving excavated and area checked with the endoscope
- ADI case study 325 | repair | leaking stop cock cut out and repaired with a universal transition coupling and 25mm fitting
- ADI case study 325 | outcome | meter still moving after the repair, though a lot slower than before
- ADI case study 325 | recommendation | replace the water meter, as its stopcock is extremely difficult to isolate
- ADI case study 325 | recommendation | reinstate the garage excavation now the repair is complete

## ADI Leak Detection case study 323: underground mains leak in Gravesend (DA3 8)

Summary: ADI Leak Detection engineer Aaron Baker investigated an underground mains leak in Gravesend, Kent (DA3 8), using acoustic correlation, tracer gas, pressure testing and visual inspection. Leak location: in the grass at the front of the property. Work done: two leaks repaired with Philmac transition couplings. Outcome: water meter no longer moved with the water back on.

- ADI case study 323 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 323 | town | Gravesend
- ADI case study 323 | postcode sector | DA3 8
- ADI case study 323 | county | Kent
- ADI case study 323 | country | England
- ADI case study 323 | leak type | Underground mains leak
- ADI case study 323 | service | Water Mains Leak Detection
- ADI case study 323 | service | Underground Leak Detection
- ADI case study 323 | engineer | Aaron Baker
- ADI case study 323 | detection method | Acoustic Correlation
- ADI case study 323 | detection method | Tracer Gas
- ADI case study 323 | detection method | Pressure Testing
- ADI case study 323 | detection method | Visual Inspection
- ADI case study 323 | property type | semi-detached building on two floors
- ADI case study 323 | symptom | high water bills
- ADI case study 323 | symptom | no visible signs of damage in the property
- ADI case study 323 | pipe material | black alkathene
- ADI case study 323 | test result | water meter still spinning with the stop cock isolated
- ADI case study 323 | test result | pressure dropped from 2 bar to 0 within a couple of minutes
- ADI case study 323 | test result | pressure still dropping on retest after the first repair
- ADI case study 323 | leak location | in the grass at the front of the property
- ADI case study 323 | leak location | pin hole in the black alkathene pipe
- ADI case study 323 | access made | two separate excavations on the mains pipework
- ADI case study 323 | repair | two leaks repaired with Philmac transition couplings
- ADI case study 323 | outcome | water meter no longer moved with the water back on
- ADI case study 323 | outcome | pressure did not drop during 1 hour pressure tests
- ADI case study 323 | recommendation | have the front lawn fully reinstated
- ADI case study 323 | recommendation | fully replace the incoming mains if further leaks occur, due to rocks in the excavations

## ADI Leak Detection case study 321: internal cold mains leak in Hawkinge (CT18 8)

Summary: ADI Leak Detection engineer Aaron Baker investigated an internal cold mains leak in Hawkinge, Kent (CT18 8), using thermal imaging, tracer gas, a damp meter, an endoscope camera, pressure testing and flow metering. Leak location: 22mm pipework under the utility sink unit. Work done: leaking section of pipe cut out and repaired. Outcome: no further leaks found on water meter and gas tests after the repair.

- ADI case study 321 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 321 | town | Hawkinge
- ADI case study 321 | postcode sector | CT18 8
- ADI case study 321 | county | Kent
- ADI case study 321 | country | England
- ADI case study 321 | leak type | Internal cold mains leak
- ADI case study 321 | service | Water Mains Leak Detection
- ADI case study 321 | service | Internal Leak Detection
- ADI case study 321 | engineer | Aaron Baker
- ADI case study 321 | detection method | Thermal Imaging
- ADI case study 321 | detection method | Tracer Gas
- ADI case study 321 | detection method | Damp Meter
- ADI case study 321 | detection method | Endoscope Camera
- ADI case study 321 | detection method | Pressure Testing
- ADI case study 321 | detection method | Flow Metering
- ADI case study 321 | property type | detached property on 2 floors
- ADI case study 321 | symptom | water damage to the hallway floor on multiple occasions
- ADI case study 321 | symptom | water meter constantly spinning
- ADI case study 321 | symptom | hallway floor removed and kitchen floor excavated before the visit without finding the leak
- ADI case study 321 | pipe material | 22mm copper
- ADI case study 321 | test result | high moisture readings across the utility, kitchen, hallway and under bedroom flooring
- ADI case study 321 | test result | water meter spinning until the internal stop cock was isolated
- ADI case study 321 | test result | pressure kept dropping and gas detected under the utility sink unit
- ADI case study 321 | leak location | 22mm pipework under the utility sink unit
- ADI case study 321 | access made | section of the sink unit cut out
- ADI case study 321 | access made | tiled floor excavated
- ADI case study 321 | repair | leaking section of pipe cut out and repaired
- ADI case study 321 | repair | 22mm copper pipe, 22mm Yorkshire coupler, 22mm coupler and 22mm elbow used
- ADI case study 321 | outcome | no further leaks found on water meter and gas tests after the repair
- ADI case study 321 | recommendation | continue with the claim process and works to dry out the property

## ADI Leak Detection case study 320: internal cold water pipe leak in Southampton (SO16 3)

Summary: ADI Leak Detection engineer Krzysztof Kobylinski investigated an internal cold water pipe leak in Southampton, Hampshire (SO16 3), using a damp meter, an endoscope camera, pressure testing and visual inspection. Leak location: underneath the bathroom basin. Work done: both leaks repaired. Outcome: no further leaks detected on the water supply system after retest.

- ADI case study 320 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 320 | town | Southampton
- ADI case study 320 | postcode sector | SO16 3
- ADI case study 320 | county | Hampshire
- ADI case study 320 | country | England
- ADI case study 320 | leak type | Internal cold water pipe leak
- ADI case study 320 | service | Water Mains Leak Detection
- ADI case study 320 | service | Internal Leak Detection
- ADI case study 320 | engineer | Krzysztof Kobylinski
- ADI case study 320 | detection method | Damp Meter
- ADI case study 320 | detection method | Endoscope Camera
- ADI case study 320 | detection method | Pressure Testing
- ADI case study 320 | detection method | Visual Inspection
- ADI case study 320 | symptom | water ingress under the bathroom basin and in the kitchen
- ADI case study 320 | symptom | visible damp staining on the kitchen wall
- ADI case study 320 | symptom | main water supply turned off due to reported flooding
- ADI case study 320 | system affected | 15mm copper pipe supplying the kitchen
- ADI case study 320 | pipe material | 15mm copper
- ADI case study 320 | test result | water pressure approximately 6 bar, high for a domestic installation
- ADI case study 320 | test result | tile adhesive on new copper pipes and wall pipes lacking adequate protection
- ADI case study 320 | test result | flexible silver pipe to the toilet cistern too short
- ADI case study 320 | leak location | underneath the bathroom basin
- ADI case study 320 | leak location | within the kitchen wall near the ceiling
- ADI case study 320 | leak cause | poorly installed fitting under the bathroom basin
- ADI case study 320 | repair | both leaks repaired
- ADI case study 320 | repair | 15mm press fittings, 15mm copper pipe and silver isolation valves used
- ADI case study 320 | outcome | no further leaks detected on the water supply system after retest
- ADI case study 320 | recommendation | monitor all newly installed fittings for signs of leakage
- ADI case study 320 | recommendation | install a pressure reducing valve because of the high water pressure
- ADI case study 320 | recommendation | long-term integrity of the system may need further attention

## ADI Leak Detection case study 319: private water supply leak in Didcot (OX11 0)

Summary: ADI Leak Detection engineer Krzysztof Kobylinski investigated a private water supply leak in Didcot, Oxfordshire (OX11 0), using acoustic listening, tracer gas, visual inspection and sectional isolation. Leak location: stop valve inside a buried chamber serving the water troughs. Work done: leak on the stop valve repaired. Outcome: readings point to a faulty digital meter or a missing or non-functioning check valve.

- ADI case study 319 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 319 | town | Didcot
- ADI case study 319 | postcode sector | OX11 0
- ADI case study 319 | county | Oxfordshire
- ADI case study 319 | country | England
- ADI case study 319 | leak type | Private water supply leak
- ADI case study 319 | service | Water Mains Leak Detection
- ADI case study 319 | service | Underground Leak Detection
- ADI case study 319 | customer type | Agricultural / Private Supply
- ADI case study 319 | engineer | Krzysztof Kobylinski
- ADI case study 319 | detection method | Acoustic Listening
- ADI case study 319 | detection method | Tracer Gas
- ADI case study 319 | detection method | Visual Inspection
- ADI case study 319 | detection method | Sectional Isolation
- ADI case study 319 | property type | farm
- ADI case study 319 | symptom | digital water meter registering 2 litres per minute
- ADI case study 319 | test result | high gas readings at a hidden valve supplying the water troughs
- ADI case study 319 | test result | meter still reading about 1 litre every 10 minutes after repairs
- ADI case study 319 | test result | meter appeared to show water flowing both forward and backwards
- ADI case study 319 | leak location | stop valve inside a buried chamber serving the water troughs
- ADI case study 319 | leak location | garden tap supply pipe
- ADI case study 319 | access made | excavation with chamber sections removed
- ADI case study 319 | repair | leak on the stop valve repaired
- ADI case study 319 | repair | garden tap supply pipe isolated as the tap is no longer in use
- ADI case study 319 | outcome | readings point to a faulty digital meter or a missing or non-functioning check valve
- ADI case study 319 | outcome | 3 minor leaks on fittings to be repaired by a plumber the customer arranged
- ADI case study 319 | recommendation | contact the Water Board
- ADI case study 319 | recommendation | have the digital water meter inspected and possibly replaced
- ADI case study 319 | recommendation | install a check valve to prevent backflow and ensure accurate readings

## ADI Leak Detection case study 315: underground water mains leak in Wokingham (RG40 1)

Summary: ADI Leak Detection engineer Krzysztof Kobylinski investigated an underground water mains leak in Wokingham, Berkshire (RG40 1), using acoustic listening, tracer gas, acoustic correlation and a ground microphone. Leak location: beneath the building bricks and under a thick concrete layer. Work done: leak repaired with 2 Philmac fittings. Outcome: all excavations backfilled.

- ADI case study 315 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 315 | town | Wokingham
- ADI case study 315 | postcode sector | RG40 1
- ADI case study 315 | county | Berkshire
- ADI case study 315 | country | England
- ADI case study 315 | leak type | Underground water mains leak
- ADI case study 315 | service | Water Mains Leak Detection
- ADI case study 315 | service | Underground Leak Detection
- ADI case study 315 | engineer | Krzysztof Kobylinski
- ADI case study 315 | detection method | Acoustic Listening
- ADI case study 315 | detection method | Tracer Gas
- ADI case study 315 | detection method | Acoustic Correlation
- ADI case study 315 | detection method | Ground Microphone
- ADI case study 315 | symptom | no water showing
- ADI case study 315 | system affected | main water supply pipe
- ADI case study 315 | pipe material | 20mm black poly
- ADI case study 315 | test result | no anomalies detected with listening equipment at first
- ADI case study 315 | test result | second gas reading dissipated within five minutes
- ADI case study 315 | test result | strong noise and gas reading on the driveway
- ADI case study 315 | leak location | beneath the building bricks and under a thick concrete layer
- ADI case study 315 | access made | excavation on the driveway exposed the water supply pipe
- ADI case study 315 | access made | third excavation extended, encountering large concrete
- ADI case study 315 | repair | leak repaired with 2 Philmac fittings
- ADI case study 315 | outcome | all excavations backfilled

## ADI Leak Detection case study 312: underground water mains leak in Brandon (CV3 4)

Summary: ADI Leak Detection engineer Krzysztof Kobylinski investigated an underground water mains leak in Brandon, West Midlands (CV3 4), using acoustic listening, tracer gas, visual inspection and pressure testing. Leak location: 25mm MDPE elbow fitting in the shared alleyway. Work done: correct pipe inserts installed and fitting securely fastened. Outcome: retest found no further leaks on the external water supply.

- ADI case study 312 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 312 | town | Brandon
- ADI case study 312 | postcode sector | CV3 4
- ADI case study 312 | county | West Midlands
- ADI case study 312 | country | England
- ADI case study 312 | leak type | Underground water mains leak
- ADI case study 312 | service | Water Mains Leak Detection
- ADI case study 312 | service | Underground Leak Detection
- ADI case study 312 | engineer | Krzysztof Kobylinski
- ADI case study 312 | detection method | Acoustic Listening
- ADI case study 312 | detection method | Tracer Gas
- ADI case study 312 | detection method | Visual Inspection
- ADI case study 312 | detection method | Pressure Testing
- ADI case study 312 | symptom | water meter spinning
- ADI case study 312 | symptom | noticeable drop in water pressure
- ADI case study 312 | symptom | recent increase in water bill
- ADI case study 312 | system affected | external water supply
- ADI case study 312 | pipe material | MDPE
- ADI case study 312 | test result | strong noise and tracer gas detected in the rear alleyway area
- ADI case study 312 | leak location | 25mm MDPE elbow fitting in the shared alleyway
- ADI case study 312 | leak cause | pipe section cut too short
- ADI case study 312 | leak cause | two pipe inserts missing
- ADI case study 312 | access made | excavation in the shared alleyway with permission from the neighbouring property
- ADI case study 312 | repair | correct pipe inserts installed and fitting securely fastened
- ADI case study 312 | repair | Plasson straight coupler and elbow, pipe inserts and 25mm MDPE pipe installed
- ADI case study 312 | outcome | retest found no further leaks on the external water supply
- ADI case study 312 | outcome | excavation backfilled
- ADI case study 312 | recommendation | review building insurance policy for trace and access cover
- ADI case study 312 | recommendation | monitor the water meter for any unusual activity

## ADI Leak Detection case study 311: internal cold mains leak in Cosham (PO6 2)

Summary: ADI Leak Detection engineer Krzysztof Kobylinski investigated an internal cold mains leak in Cosham, Hampshire (PO6 2), using acoustic correlation, tracer gas, visual inspection and pressure testing. Leak location: lead tee junction beneath the kitchen floor. Work done: two lead tee junctions replaced with plastic pipework and fittings. Outcome: system tested and confirmed leak-free with no further leaks on the internal main.

- ADI case study 311 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 311 | town | Cosham
- ADI case study 311 | postcode sector | PO6 2
- ADI case study 311 | county | Hampshire
- ADI case study 311 | country | England
- ADI case study 311 | leak type | Internal cold mains leak
- ADI case study 311 | service | Water Mains Leak Detection
- ADI case study 311 | service | Internal Leak Detection
- ADI case study 311 | engineer | Krzysztof Kobylinski
- ADI case study 311 | detection method | Acoustic Correlation
- ADI case study 311 | detection method | Tracer Gas
- ADI case study 311 | detection method | Visual Inspection
- ADI case study 311 | detection method | Pressure Testing
- ADI case study 311 | symptom | damage to the conservatory wall with no visible water
- ADI case study 311 | pipe material | lead
- ADI case study 311 | test result | acoustic equipment detected noise in the conservatory area
- ADI case study 311 | test result | positive tracer gas readings beneath the kitchen floor
- ADI case study 311 | leak location | lead tee junction beneath the kitchen floor
- ADI case study 311 | access made | skirting boards and floor panels removed and floorboards lifted
- ADI case study 311 | repair | two lead tee junctions replaced with plastic pipework and fittings
- ADI case study 311 | repair | internal stop valve replaced with a 25mm Plasson plastic stop valve
- ADI case study 311 | repair | 25mm MDPE used with 2 equal tees, 5 straight couplings and 6 rubber adapters
- ADI case study 311 | outcome | system tested and confirmed leak-free with no further leaks on the internal main
- ADI case study 311 | outcome | floorboards and laminate flooring reinstated

## ADI Leak Detection case study 310: lead water mains leak in Kirkbymoorside (YO62 6)

Summary: ADI Leak Detection engineer Robert Gires investigated a lead water mains leak in Kirkbymoorside, North Yorkshire (YO62 6), using thermal imaging, a damp meter, an endoscope camera, pressure testing and acoustic listening. Leak location: external main under the door frame between the kitchen and corridor. Work done: repaired with a lead pipe adapter and plastic pipe.

- ADI case study 310 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 310 | town | Kirkbymoorside
- ADI case study 310 | postcode sector | YO62 6
- ADI case study 310 | county | North Yorkshire
- ADI case study 310 | country | England
- ADI case study 310 | leak type | Lead water mains leak
- ADI case study 310 | service | Water Mains Leak Detection
- ADI case study 310 | service | Underground Leak Detection
- ADI case study 310 | engineer | Robert Gires
- ADI case study 310 | detection method | Thermal Imaging
- ADI case study 310 | detection method | Damp Meter
- ADI case study 310 | detection method | Endoscope Camera
- ADI case study 310 | detection method | Pressure Testing
- ADI case study 310 | detection method | Acoustic Listening
- ADI case study 310 | property type | large terraced house
- ADI case study 310 | symptom | water visibly coming up at the front of the property
- ADI case study 310 | pipe material | lead
- ADI case study 310 | test result | external main and internal cold water pipe lost pressure too fast to test
- ADI case study 310 | test result | leak noise heard next to the door and kitchen unit while pressurising
- ADI case study 310 | test result | water pressure over 7 bar with the leak
- ADI case study 310 | leak location | external main under the door frame between the kitchen and corridor
- ADI case study 310 | access made | floor dug up in the kitchen
- ADI case study 310 | access made | wood floor and 100 mm insulation removed and concrete floor dug up
- ADI case study 310 | repair | repaired with a lead pipe adapter and plastic pipe
- ADI case study 310 | recommendation | replace the very old lead external main cold water pipe urgently
- ADI case study 310 | recommendation | install a pressure reduction valve in the kitchen as water pressure is very high

## ADI Leak Detection case study 309: internal cold mains leak in Welton (HU15 1)

Summary: ADI Leak Detection engineer Robert Gires investigated an internal cold mains leak in Welton, East Riding of Yorkshire (HU15 1), using pressure testing, tracer gas and visual inspection. Leak location: beneath the kitchen unit floor in the utility room. Work done: elbow and small pieces of pipe replaced. Outcome: all pipework held 5 bar for 60 minutes with no pressure loss after the repair.

- ADI case study 309 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 309 | town | Welton
- ADI case study 309 | postcode sector | HU15 1
- ADI case study 309 | county | East Riding of Yorkshire
- ADI case study 309 | country | England
- ADI case study 309 | leak type | Internal cold mains leak
- ADI case study 309 | service | Water Mains Leak Detection
- ADI case study 309 | service | Internal Leak Detection
- ADI case study 309 | engineer | Robert Gires
- ADI case study 309 | detection method | Pressure Testing
- ADI case study 309 | detection method | Tracer Gas
- ADI case study 309 | detection method | Visual Inspection
- ADI case study 309 | property type | very large detached house converted into a large apartment
- ADI case study 309 | symptom | water meter constantly spinning very slowly
- ADI case study 309 | symptom | water meter not moving with the internal cold water stopcock off
- ADI case study 309 | test result | internal cold water pipe failed a 4 bar test over 30 minutes
- ADI case study 309 | test result | tracer gas at 4 bar found under the kitchen unit next to the washing machine
- ADI case study 309 | leak location | beneath the kitchen unit floor in the utility room
- ADI case study 309 | leak cause | faulty plastic push fit fitting
- ADI case study 309 | access made | kitchen unit removed and concrete floor dug up
- ADI case study 309 | repair | elbow and small pieces of pipe replaced
- ADI case study 309 | outcome | all pipework held 5 bar for 60 minutes with no pressure loss after the repair
- ADI case study 309 | outcome | no tracer gas picked up after the repair
- ADI case study 309 | recommendation | install a pressure reduction valve on the internal cold water pipe
- ADI case study 309 | recommendation | leave the leak area to dry before the concrete is repaired

## ADI Leak Detection case study 307: external cold water mains leak in New Marske (TS11 8)

Summary: ADI Leak Detection engineer Robert Gires investigated an external cold water mains leak in New Marske, North Yorkshire (TS11 8), using pressure testing, an endoscope camera, a damp meter and acoustic listening. Leak location: middle of the kitchen floor. Work done: 20 mm fitting and 2 adaptors from 20 mm to the black plastic pipe used.

- ADI case study 307 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 307 | town | New Marske
- ADI case study 307 | postcode sector | TS11 8
- ADI case study 307 | county | North Yorkshire
- ADI case study 307 | country | England
- ADI case study 307 | leak type | External cold water mains leak
- ADI case study 307 | service | Water Mains Leak Detection
- ADI case study 307 | service | Underground Leak Detection
- ADI case study 307 | engineer | Robert Gires
- ADI case study 307 | detection method | Pressure Testing
- ADI case study 307 | detection method | Endoscope Camera
- ADI case study 307 | detection method | Damp Meter
- ADI case study 307 | detection method | Acoustic Listening
- ADI case study 307 | property type | large semi-detached house
- ADI case study 307 | symptom | water meter constantly spinning very slowly
- ADI case study 307 | symptom | water meter still spinning with the internal stopcock isolated
- ADI case study 307 | pipe material | black plastic
- ADI case study 307 | test result | internal cold and hot water pipes held 4 bar for 45 minutes with no loss
- ADI case study 307 | test result | external main cold water pipe failed a 4 bar test over 5 minutes
- ADI case study 307 | test result | very noisy under the kitchen unit
- ADI case study 307 | leak location | middle of the kitchen floor
- ADI case study 307 | leak cause | external main pipe under the timber floor damaged by the timber
- ADI case study 307 | access made | kitchen unit removed so an endoscope could see under the floor
- ADI case study 307 | access made | small pieces of the floor cut out
- ADI case study 307 | repair | 20 mm fitting and 2 adaptors from 20 mm to the black plastic pipe used
- ADI case study 307 | recommendation | replace the external main cold water pipe

## ADI Leak Detection case study 306: internal cold water leak in Wath upon Dearne (S63 7)

Summary: ADI Leak Detection engineer Robert Gires investigated an internal cold water leak in Wath upon Dearne, South Yorkshire (S63 7), using thermal imaging, acoustic correlation, a damp meter and pressure testing. Leak location: copper pipe under the floor. Work done: pipe replaced and all the pipework retested. Outcome: dishwasher disconnected because the pipework was damaged by a mouse or rat.

- ADI case study 306 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 306 | town | Wath upon Dearne
- ADI case study 306 | postcode sector | S63 7
- ADI case study 306 | county | South Yorkshire
- ADI case study 306 | country | England
- ADI case study 306 | leak type | Internal cold water leak
- ADI case study 306 | service | Water Mains Leak Detection
- ADI case study 306 | service | Internal Leak Detection
- ADI case study 306 | customer type | Healthcare / Commercial Property
- ADI case study 306 | engineer | Robert Gires
- ADI case study 306 | detection method | Thermal Imaging
- ADI case study 306 | detection method | Acoustic Correlation
- ADI case study 306 | detection method | Damp Meter
- ADI case study 306 | detection method | Pressure Testing
- ADI case study 306 | property type | large care home
- ADI case study 306 | symptom | internal cold water pipe leaking very badly
- ADI case study 306 | symptom | water meter constantly spinning very fast
- ADI case study 306 | symptom | kitchen floor very wet
- ADI case study 306 | pipe material | copper
- ADI case study 306 | test result | thermal imaging found 2 cold pipes, by the dishwasher and the fridge freezer
- ADI case study 306 | test result | pipework could not be pressurised because the leak was very big
- ADI case study 306 | test result | acoustic evidence in front of the dishwasher
- ADI case study 306 | leak location | copper pipe under the floor
- ADI case study 306 | leak location | second leak next to the fridge freezer
- ADI case study 306 | leak cause | faulty fitting at the second leak
- ADI case study 306 | access made | vinyl flooring removed, with the whole floor very wet beneath
- ADI case study 306 | repair | pipe replaced and all the pipework retested
- ADI case study 306 | outcome | dishwasher disconnected because the pipework was damaged by a mouse or rat
- ADI case study 306 | recommendation | replace the internal stopcock and fit a pressure reduction valve on the cold supply
- ADI case study 306 | recommendation | replace the whole kitchen floor, which is badly damaged by water

## ADI Leak Detection case study 304: central heating leak in Southampton (SO18 6)

Summary: ADI Leak Detection engineer Robert Gires investigated a central heating leak in Southampton, Hampshire (SO18 6), using thermal imaging, a damp meter, tracer gas, an endoscope camera and acoustic correlation. Leak location: in the kitchen under the tiled floor. Work done: faulty fitting replaced.

- ADI case study 304 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 304 | town | Southampton
- ADI case study 304 | postcode sector | SO18 6
- ADI case study 304 | county | Hampshire
- ADI case study 304 | country | England
- ADI case study 304 | leak type | Central heating leak
- ADI case study 304 | service | Water Mains Leak Detection
- ADI case study 304 | service | Internal Leak Detection
- ADI case study 304 | engineer | Robert Gires
- ADI case study 304 | detection method | Thermal Imaging
- ADI case study 304 | detection method | Damp Meter
- ADI case study 304 | detection method | Tracer Gas
- ADI case study 304 | detection method | Endoscope Camera
- ADI case study 304 | detection method | Acoustic Correlation
- ADI case study 304 | property type | large detached house
- ADI case study 304 | symptom | heating system losing pressure
- ADI case study 304 | test result | thermal imaging anomaly in the kitchen in front of the fridge freezer
- ADI case study 304 | test result | tracer gas at 1 bar held for 60 minutes with no pressure loss
- ADI case study 304 | test result | tracer gas at 3 bar picked up in the corridor under the stairs
- ADI case study 304 | leak location | in the kitchen under the tiled floor
- ADI case study 304 | leak cause | faulty push fit fitting
- ADI case study 304 | access made | 2 tiles and the wooden floorboards removed
- ADI case study 304 | repair | faulty fitting replaced
- ADI case study 304 | recommendation | leave the floor open to dry properly before repairing
- ADI case study 304 | recommendation | set the boiler at a low temperature

## ADI Leak Detection case study 303: underground water mains leak in Lincoln (LN6 3)

Summary: ADI Leak Detection engineer Robert Gires investigated an underground water mains leak in Lincoln, Lincolnshire (LN6 3), using pressure testing, tracer gas and acoustic listening. Leak location: in the front garden next to the water meter. Work done: damaged black plastic pipe section replaced with new blue plastic pipe and fittings.

- ADI case study 303 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 303 | town | Lincoln
- ADI case study 303 | postcode sector | LN6 3
- ADI case study 303 | county | Lincolnshire
- ADI case study 303 | country | England
- ADI case study 303 | leak type | Underground water mains leak
- ADI case study 303 | service | Water Mains Leak Detection
- ADI case study 303 | service | Underground Leak Detection
- ADI case study 303 | engineer | Robert Gires
- ADI case study 303 | detection method | Pressure Testing
- ADI case study 303 | detection method | Tracer Gas
- ADI case study 303 | detection method | Acoustic Listening
- ADI case study 303 | property type | large semi-detached house
- ADI case study 303 | symptom | water meter constantly spinning
- ADI case study 303 | pipe material | black plastic
- ADI case study 303 | test result | internal cold and hot water pipes held 3 bar for 30 minutes with no loss
- ADI case study 303 | test result | external main cold water pipe failed a 3 bar tracer gas test over 10 minutes
- ADI case study 303 | test result | tracer gas and audible leak noise in the front garden next to the water meter
- ADI case study 303 | leak location | in the front garden next to the water meter
- ADI case study 303 | leak cause | cracked pipe next to a fitting
- ADI case study 303 | access made | soil excavated
- ADI case study 303 | repair | damaged black plastic pipe section replaced with new blue plastic pipe and fittings
- ADI case study 303 | recommendation | monitor the water meter regularly for unusual activity
- ADI case study 303 | recommendation | consult the insurance provider about trace and access cover on building insurance

## ADI Leak Detection case study 301: underground water mains leak in Grantham (NG31 9)

Summary: ADI Leak Detection engineer Robert Gires investigated an underground water mains leak in Grantham, Lincolnshire (NG31 9), using acoustic correlation, tracer gas, pressure testing and visual inspection. Leak location: lead pipe next to the old external stopcock. Work done: damaged pipe cut and replaced with a universal transit coupling and small pieces of pipe.

- ADI case study 301 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 301 | town | Grantham
- ADI case study 301 | postcode sector | NG31 9
- ADI case study 301 | county | Lincolnshire
- ADI case study 301 | country | England
- ADI case study 301 | leak type | Underground water mains leak
- ADI case study 301 | service | Water Mains Leak Detection
- ADI case study 301 | service | Underground Leak Detection
- ADI case study 301 | engineer | Robert Gires
- ADI case study 301 | detection method | Acoustic Correlation
- ADI case study 301 | detection method | Tracer Gas
- ADI case study 301 | detection method | Pressure Testing
- ADI case study 301 | detection method | Visual Inspection
- ADI case study 301 | property type | very large semi-detached house
- ADI case study 301 | symptom | water meter constantly spinning very slowly
- ADI case study 301 | symptom | water meter still spinning with the internal cold water stopcock isolated
- ADI case study 301 | pipe material | lead
- ADI case study 301 | test result | internal cold water pipework held 5.5 bar for 30 minutes with no pressure loss
- ADI case study 301 | test result | tracer gas picked up on the driveway close to the water meter
- ADI case study 301 | test result | acoustic evidence on the driveway paving close to the water meter box
- ADI case study 301 | leak location | lead pipe next to the old external stopcock
- ADI case study 301 | access made | concrete paving slab removed and soil dug out
- ADI case study 301 | repair | damaged pipe cut and replaced with a universal transit coupling and small pieces of pipe
- ADI case study 301 | recommendation | install a pressure reduction valve on the internal cold water pipe
- ADI case study 301 | recommendation | water pressure very high and could damage the internal pipework
- ADI case study 301 | recommendation | replace the very old lead external main cold water pipe

## ADI Leak Detection case study 300: internal cold mains leak in Beaconsfield (HP9 2)

Summary: ADI Leak Detection engineer Richard Poberezniuk investigated an internal cold mains leak in Beaconsfield, Buckinghamshire (HP9 2), using acoustic correlation, thermal imaging, tracer gas, pressure testing and flow metering. Leak location: beneath the boxing in the ground floor WC. Work done: faulty 15mm copper pipe replaced with about a metre of 15mm Hep20 pipe.

- ADI case study 300 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 300 | town | Beaconsfield
- ADI case study 300 | postcode sector | HP9 2
- ADI case study 300 | county | Buckinghamshire
- ADI case study 300 | country | England
- ADI case study 300 | leak type | Internal cold mains leak
- ADI case study 300 | service | Water Mains Leak Detection
- ADI case study 300 | service | Internal Leak Detection
- ADI case study 300 | engineer | Richard Poberezniuk
- ADI case study 300 | detection method | Acoustic Correlation
- ADI case study 300 | detection method | Thermal Imaging
- ADI case study 300 | detection method | Tracer Gas
- ADI case study 300 | detection method | Pressure Testing
- ADI case study 300 | detection method | Flow Metering
- ADI case study 300 | symptom | flow at the water meter that stopped when the internal stopcock was turned off
- ADI case study 300 | system affected | 15mm supply pipe to the WC
- ADI case study 300 | pipe material | copper
- ADI case study 300 | test result | internal cold mains failed a 3 bar pressure test over 5 minutes
- ADI case study 300 | test result | acoustic noise under boxing in the ground floor WC next to the toilet pan
- ADI case study 300 | test result | noise still present with the WC isolated
- ADI case study 300 | leak location | beneath the boxing in the ground floor WC
- ADI case study 300 | leak cause | pinhole in the 15mm copper supply pipe
- ADI case study 300 | access made | excavation to locate the leak
- ADI case study 300 | repair | faulty 15mm copper pipe replaced with about a metre of 15mm Hep20 pipe
- ADI case study 300 | repair | non-working WC isolation valve replaced
- ADI case study 300 | recommendation | monitor the meter for further leaks

## ADI Leak Detection case study 299: underground water mains leak in Bidford-on-Avon (B50 4)

Summary: ADI Leak Detection engineer Richard Poberezniuk investigated an underground water mains leak in Bidford-on-Avon, Warwickshire (B50 4), using tracer gas, pressure testing, flow metering and visual inspection. Leak location: under the flooding lawn, where tracer gas was seen coming up. Work done: 28mm black alkathene main repaired with a 28mm transition coupling. Outcome: external cold mains passed a 4.5 bar pressure test over 20 minutes after the repair.

- ADI case study 299 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 299 | town | Bidford-on-Avon
- ADI case study 299 | postcode sector | B50 4
- ADI case study 299 | county | Warwickshire
- ADI case study 299 | country | England
- ADI case study 299 | leak type | Underground water mains leak
- ADI case study 299 | service | Water Mains Leak Detection
- ADI case study 299 | service | Underground Leak Detection
- ADI case study 299 | engineer | Richard Poberezniuk
- ADI case study 299 | detection method | Tracer Gas
- ADI case study 299 | detection method | Pressure Testing
- ADI case study 299 | detection method | Flow Metering
- ADI case study 299 | detection method | Visual Inspection
- ADI case study 299 | symptom | water seeping through the lawn on arrival
- ADI case study 299 | system affected | external 28mm cold main
- ADI case study 299 | pipe material | black alkathene
- ADI case study 299 | test result | flow at the meter with the internal stopcock off, suggesting an external cold mains leak
- ADI case study 299 | test result | internal cold mains passed a 4.5 bar pressure test over 20 minutes
- ADI case study 299 | test result | external cold mains failed a 4.5 bar pressure test over 5 minutes
- ADI case study 299 | leak location | under the flooding lawn, where tracer gas was seen coming up
- ADI case study 299 | leak cause | large rock rubbing on the 28mm cold main
- ADI case study 299 | access made | excavation where the gas surfaced in the lawn
- ADI case study 299 | repair | 28mm black alkathene main repaired with a 28mm transition coupling
- ADI case study 299 | outcome | external cold mains passed a 4.5 bar pressure test over 20 minutes after the repair
- ADI case study 299 | outcome | no flow at the water meter on the final flow test
- ADI case study 299 | recommendation | monitor the water meter for excessive usage

## ADI Leak Detection case study 297: underground water mains leak in Dinmore (HR4 9)

Summary: ADI Leak Detection engineer Richard Poberezniuk investigated an underground water mains leak in Dinmore, Herefordshire (HR4 9), using acoustic correlation, tracer gas, pressure testing, flow metering and visual inspection. Leak location: next to the boundary wall and front gate. Work done: damaged lead pipe replaced with 2 transition couplings and a short piece of 20mm MDPE. Outcome: no flow at the meter after the repair.

- ADI case study 297 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 297 | town | Dinmore
- ADI case study 297 | postcode sector | HR4 9
- ADI case study 297 | county | Herefordshire
- ADI case study 297 | country | England
- ADI case study 297 | leak type | Underground water mains leak
- ADI case study 297 | service | Water Mains Leak Detection
- ADI case study 297 | service | Underground Leak Detection
- ADI case study 297 | engineer | Richard Poberezniuk
- ADI case study 297 | detection method | Acoustic Correlation
- ADI case study 297 | detection method | Tracer Gas
- ADI case study 297 | detection method | Pressure Testing
- ADI case study 297 | detection method | Flow Metering
- ADI case study 297 | detection method | Visual Inspection
- ADI case study 297 | symptom | flow at the water meter on arrival
- ADI case study 297 | pipe material | lead
- ADI case study 297 | test result | external cold mains failed a 3.5 bar pressure test over 5 minutes
- ADI case study 297 | test result | internal cold mains passed a 3.5 bar pressure test over 20 minutes
- ADI case study 297 | test result | acoustic high reading next to the boundary wall and front gate
- ADI case study 297 | leak location | next to the boundary wall and front gate
- ADI case study 297 | access made | excavation at the location of the high readings, exposing the damaged lead mains
- ADI case study 297 | repair | damaged lead pipe replaced with 2 transition couplings and a short piece of 20mm MDPE
- ADI case study 297 | outcome | no flow at the meter after the repair
- ADI case study 297 | outcome | external cold mains passed a 3.5 bar pressure test over 20 minutes after the repair
- ADI case study 297 | recommendation | relay the lead mains in the future

## ADI Leak Detection case study 296: internal cold mains leak in Barry (CF5 1)

Summary: ADI Leak Detection engineer Richard Poberezniuk investigated an internal cold mains leak in Barry, South Glamorgan (CF5 1), using acoustic correlation, tracer gas, a damp meter, pressure testing and visual inspection. Leak location: original lead pipe below the hallway floorboards, beside a transition coupling to 25mm MDPE. Work done: lead pipe repaired with a transition coupling and short piece of 25mm MDPE pipe. Outcome: further leak along the hallway found when testing after the repair.

- ADI case study 296 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 296 | town | Barry
- ADI case study 296 | postcode sector | CF5 1
- ADI case study 296 | county | South Glamorgan
- ADI case study 296 | country | Wales
- ADI case study 296 | leak type | Internal cold mains leak
- ADI case study 296 | service | Water Mains Leak Detection
- ADI case study 296 | service | Internal Leak Detection
- ADI case study 296 | engineer | Richard Poberezniuk
- ADI case study 296 | detection method | Acoustic Correlation
- ADI case study 296 | detection method | Tracer Gas
- ADI case study 296 | detection method | Damp Meter
- ADI case study 296 | detection method | Pressure Testing
- ADI case study 296 | detection method | Visual Inspection
- ADI case study 296 | symptom | flow at the water meter with the internal stopcock turned off
- ADI case study 296 | pipe material | lead
- ADI case study 296 | test result | internal cold mains passed a 1.5 bar pressure test over 15 minutes
- ADI case study 296 | test result | external cold mains failed a 2.5 bar pressure test over 5 minutes
- ADI case study 296 | test result | tracer gas gave a high reading in the hallway next to the living room door
- ADI case study 296 | leak location | original lead pipe below the hallway floorboards, beside a transition coupling to 25mm MDPE
- ADI case study 296 | leak cause | hole blown out in the original lead pipe
- ADI case study 296 | access made | carpet and floorboards lifted in the hallway and excavation below the floorboards
- ADI case study 296 | repair | lead pipe repaired with a transition coupling and short piece of 25mm MDPE pipe
- ADI case study 296 | outcome | further leak along the hallway found when testing after the repair
- ADI case study 296 | recommendation | customer to appoint a contractor to replace the remaining internal lead mains

## ADI Leak Detection case study 295: concealed cold mains leak in Bath (BS31 1)

Summary: ADI Leak Detection engineer Richard Poberezniuk investigated a concealed cold mains leak in Bath, Somerset (BS31 1), using pressure testing, tracer gas, a damp meter, an endoscope camera and acoustic listening. Leak location: on the cold main beneath the kitchen floor. Work done: 15mm copper cold main cut at both excavations to pull out the leaking pipe. Outcome: external cold mains passed a 4 bar pressure test over 30 minutes after the repair.

- ADI case study 295 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 295 | town | Bath
- ADI case study 295 | postcode sector | BS31 1
- ADI case study 295 | county | Somerset
- ADI case study 295 | country | England
- ADI case study 295 | leak type | Concealed cold mains leak
- ADI case study 295 | service | Water Mains Leak Detection
- ADI case study 295 | service | Underground Leak Detection
- ADI case study 295 | engineer | Richard Poberezniuk
- ADI case study 295 | detection method | Pressure Testing
- ADI case study 295 | detection method | Tracer Gas
- ADI case study 295 | detection method | Damp Meter
- ADI case study 295 | detection method | Endoscope Camera
- ADI case study 295 | detection method | Acoustic Listening
- ADI case study 295 | symptom | water damage to the kitchen wall
- ADI case study 295 | system affected | 15mm incoming cold main in Armaflex lagging
- ADI case study 295 | pipe material | copper
- ADI case study 295 | test result | internal cold mains passed a 4 bar pressure test over 20 minutes
- ADI case study 295 | test result | external cold mains failed a 4 bar pressure test over 5 minutes
- ADI case study 295 | test result | tracer gas gave high readings behind the dishwasher and in the internal kitchen wall
- ADI case study 295 | leak location | on the cold main beneath the kitchen floor
- ADI case study 295 | leak cause | leaking soldered joint
- ADI case study 295 | access made | built in dishwasher removed and excavations carried out
- ADI case study 295 | access made | excavation in the concrete screed floor near the internal wall
- ADI case study 295 | repair | 15mm copper cold main cut at both excavations to pull out the leaking pipe
- ADI case study 295 | repair | leaking copper mains replaced with 3 metres of 15mm Hep20
- ADI case study 295 | outcome | external cold mains passed a 4 bar pressure test over 30 minutes after the repair
- ADI case study 295 | recommendation | dry out with a dehumidifier before making good the floors and redecorating

## ADI Leak Detection case study 292: underground water mains leak in Gloucester (GL5 1)

Summary: ADI Leak Detection engineer Richard Poberezniuk investigated an underground water mains leak in Gloucester, Gloucestershire (GL5 1), using acoustic correlation, tracer gas, pressure testing, flow metering and visual inspection. Leak location: conversion joint in the concrete courtyard. Work done: faulty joint replaced with 25mm x 15mm transition coupling, 25mm MDPE coupling and pipe. Outcome: repair passed a 4.2 bar pressure test over 10 minutes.

- ADI case study 292 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 292 | town | Gloucester
- ADI case study 292 | postcode sector | GL5 1
- ADI case study 292 | county | Gloucestershire
- ADI case study 292 | country | England
- ADI case study 292 | leak type | Underground water mains leak
- ADI case study 292 | service | Water Mains Leak Detection
- ADI case study 292 | service | Underground Leak Detection
- ADI case study 292 | engineer | Richard Poberezniuk
- ADI case study 292 | detection method | Acoustic Correlation
- ADI case study 292 | detection method | Tracer Gas
- ADI case study 292 | detection method | Pressure Testing
- ADI case study 292 | detection method | Flow Metering
- ADI case study 292 | detection method | Visual Inspection
- ADI case study 292 | symptom | flow at the water meter continued with the internal stopcock turned off
- ADI case study 292 | pipe material | copper
- ADI case study 292 | pipe material | MDPE
- ADI case study 292 | test result | internal cold mains passed a 2 bar pressure test over 15 minutes
- ADI case study 292 | test result | external cold mains failed a 2 bar pressure test over 5 minutes
- ADI case study 292 | test result | tracer gas gave a high reading in the courtyard next to a drain cover
- ADI case study 292 | leak location | conversion joint in the concrete courtyard
- ADI case study 292 | leak cause | poorly installed conversion joint from 15mm copper to 25mm MDPE
- ADI case study 292 | access made | excavation in the concrete courtyard
- ADI case study 292 | repair | faulty joint replaced with 25mm x 15mm transition coupling, 25mm MDPE coupling and pipe
- ADI case study 292 | outcome | repair passed a 4.2 bar pressure test over 10 minutes
- ADI case study 292 | outcome | no flow at the water meter on the final flow test
- ADI case study 292 | recommendation | monitor the meter for further excessive usage

## ADI Leak Detection case study 291: internal cold mains leak in Cricklade (SN5 4)

Summary: ADI Leak Detection engineer Richard Poberezniuk investigated an internal cold mains leak in Cricklade, Wiltshire (SN5 4), using thermal imaging, tracer gas, a damp meter, an endoscope camera, pressure testing and visual inspection. Leak location: entry point of the hot and cold supplies to the external utility room. Work done: repair made with 2 15mm push fit couplings and a short piece of copper pipe. Outcome: final 15 minute pressure test passed.

- ADI case study 291 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 291 | town | Cricklade
- ADI case study 291 | postcode sector | SN5 4
- ADI case study 291 | county | Wiltshire
- ADI case study 291 | country | England
- ADI case study 291 | leak type | Internal cold mains leak
- ADI case study 291 | service | Water Mains Leak Detection
- ADI case study 291 | service | Internal Leak Detection
- ADI case study 291 | engineer | Richard Poberezniuk
- ADI case study 291 | detection method | Thermal Imaging
- ADI case study 291 | detection method | Tracer Gas
- ADI case study 291 | detection method | Damp Meter
- ADI case study 291 | detection method | Endoscope Camera
- ADI case study 291 | detection method | Pressure Testing
- ADI case study 291 | detection method | Visual Inspection
- ADI case study 291 | symptom | noise of water heard in the external utility room
- ADI case study 291 | symptom | puddling outside the utility room
- ADI case study 291 | system affected | 15mm cold supply
- ADI case study 291 | test result | internal cold mains failed a 4.5 bar pressure test over 5 minutes
- ADI case study 291 | test result | external cold mains passed a 4.5 bar pressure test over 20 minutes
- ADI case study 291 | leak location | entry point of the hot and cold supplies to the external utility room
- ADI case study 291 | leak location | further leak on the same pipe below the original repair in the concrete slab
- ADI case study 291 | leak cause | pinhole in the pipe
- ADI case study 291 | access made | excavation to expose the cold supply
- ADI case study 291 | access made | carousel unit dismantled and its floor cut away to reach the supplies
- ADI case study 291 | repair | repair made with 2 15mm push fit couplings and a short piece of copper pipe
- ADI case study 291 | repair | supplies isolated and capped as the pipe was substandard with no acid erosion protection
- ADI case study 291 | repair | capping done with 2 15mm push fit cap ends
- ADI case study 291 | outcome | final 15 minute pressure test passed
- ADI case study 291 | recommendation | dry out with dehumidifiers before reinstatement

## ADI Leak Detection case study 289: internal cold mains leak in Derby (DE73 8)

Summary: ADI Leak Detection engineer Paul Hope investigated an internal cold mains leak in Derby, Derbyshire (DE73 8), using acoustic correlation, visual inspection, pressure testing and sectional isolation. Leak location: automatic urinal flush cistermiser in the gents toilet. Work done: valve feeding the urinal opened only very slightly to keep it working. Outcome: no pipe leaks indicated at this time.

- ADI case study 289 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 289 | town | Derby
- ADI case study 289 | postcode sector | DE73 8
- ADI case study 289 | county | Derbyshire
- ADI case study 289 | country | England
- ADI case study 289 | leak type | Internal cold mains leak
- ADI case study 289 | service | Water Mains Leak Detection
- ADI case study 289 | service | Internal Leak Detection
- ADI case study 289 | engineer | Paul Hope
- ADI case study 289 | detection method | Acoustic Correlation
- ADI case study 289 | detection method | Visual Inspection
- ADI case study 289 | detection method | Pressure Testing
- ADI case study 289 | detection method | Sectional Isolation
- ADI case study 289 | symptom | external meter showing usage of around two and a half litres per minute
- ADI case study 289 | system affected | automatic urinal flush
- ADI case study 289 | test result | acoustic profile became strong in the gents toilet
- ADI case study 289 | test result | meter usage dropped to 3 litres per hour once the urinal flush was isolated
- ADI case study 289 | test result | 3 bar held with no drop over the 45 minute test
- ADI case study 289 | leak location | automatic urinal flush cistermiser in the gents toilet
- ADI case study 289 | leak location | hot tap behind the bar with a constant drip
- ADI case study 289 | leak cause | automatic urinal flush stopped working and kept filling and flushing
- ADI case study 289 | repair | valve feeding the urinal opened only very slightly to keep it working
- ADI case study 289 | outcome | no pipe leaks indicated at this time
- ADI case study 289 | recommendation | replace or repair the cistermiser as soon as convenient
- ADI case study 289 | recommendation | repair all leaking taps
- ADI case study 289 | recommendation | basin waste in the first floor toilet found dripping onto the floor

## ADI Leak Detection case study 288: underground mains leak in Wallasey (CH45 1)

Summary: ADI Leak Detection engineer Paul Hope investigated an underground mains leak in Wallasey, Merseyside (CH45 1), using acoustic correlation, thermal imaging, tracer gas, a damp meter and pressure testing. Leak location: in the back garden, where tracer gas was detected. Work done: damaged section of pipe removed and repaired. Outcome: no further loss of pressure on the day of testing.

- ADI case study 288 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 288 | town | Wallasey
- ADI case study 288 | postcode sector | CH45 1
- ADI case study 288 | county | Merseyside
- ADI case study 288 | country | England
- ADI case study 288 | leak type | Underground mains leak
- ADI case study 288 | service | Water Mains Leak Detection
- ADI case study 288 | service | Underground Leak Detection
- ADI case study 288 | engineer | Paul Hope
- ADI case study 288 | detection method | Acoustic Correlation
- ADI case study 288 | detection method | Thermal Imaging
- ADI case study 288 | detection method | Tracer Gas
- ADI case study 288 | detection method | Damp Meter
- ADI case study 288 | detection method | Pressure Testing
- ADI case study 288 | property type | house
- ADI case study 288 | symptom | meter recording usage of 25 litres per hour
- ADI case study 288 | test result | strong leak profile at the stop cock in the downstairs bathroom
- ADI case study 288 | test result | maximum moisture levels on the dining room and bathroom walls
- ADI case study 288 | test result | pressure set to 3 bar dropped to 0 within 20 minutes
- ADI case study 288 | leak location | in the back garden, where tracer gas was detected
- ADI case study 288 | access made | ground excavated to expose the leaking pipe
- ADI case study 288 | repair | damaged section of pipe removed and repaired
- ADI case study 288 | repair | Philmac transitional coupling and stop end used to shut off the leak
- ADI case study 288 | outcome | no further loss of pressure on the day of testing
- ADI case study 288 | recommendation | appoint a specialist damp company to check the damp damage first

## ADI Leak Detection case study 286: internal cold mains leak in Stockport (SK7 3)

Summary: ADI Leak Detection engineer Paul Hope investigated an internal cold mains leak in Stockport, Greater Manchester (SK7 3), using acoustic correlation, pressure testing, a damp meter, visual inspection and sectional isolation. Leak location: in the back room near the bay window. Work done: damaged section sliced out and replaced. Outcome: repair held 2 bar for 45 minutes with no drop.

- ADI case study 286 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 286 | town | Stockport
- ADI case study 286 | postcode sector | SK7 3
- ADI case study 286 | county | Greater Manchester
- ADI case study 286 | country | England
- ADI case study 286 | leak type | Internal cold mains leak
- ADI case study 286 | service | Water Mains Leak Detection
- ADI case study 286 | service | Internal Leak Detection
- ADI case study 286 | engineer | Paul Hope
- ADI case study 286 | detection method | Acoustic Correlation
- ADI case study 286 | detection method | Pressure Testing
- ADI case study 286 | detection method | Damp Meter
- ADI case study 286 | detection method | Visual Inspection
- ADI case study 286 | detection method | Sectional Isolation
- ADI case study 286 | property type | house
- ADI case study 286 | symptom | meter dial constantly spinning
- ADI case study 286 | symptom | water sitting under the floor in the crawl space
- ADI case study 286 | symptom | damp damage throughout, swollen doors and some electrical circuits not operating
- ADI case study 286 | test result | section from the hatch to the meter held 3 bar
- ADI case study 286 | test result | pressure began to drop on the pipe from the hatch into the house
- ADI case study 286 | test result | boiler pressure gauge showed pressure loss
- ADI case study 286 | leak location | in the back room near the bay window
- ADI case study 286 | leak cause | split connection fitting
- ADI case study 286 | access made | warped laminate removed in the bay area, revealing saturated floorboards and joists
- ADI case study 286 | repair | damaged section sliced out and replaced
- ADI case study 286 | repair | speed fit pipe and fittings used
- ADI case study 286 | outcome | repair held 2 bar for 45 minutes with no drop
- ADI case study 286 | outcome | system refilled, bled and turned on
- ADI case study 286 | recommendation | install a stopcock under the access hatch
- ADI case study 286 | recommendation | add inhibitor to the heating system when convenient

## ADI Leak Detection case study 285: internal cold mains leak in Oldham (OL2 7)

Summary: ADI Leak Detection engineer Paul Hope investigated an internal cold mains leak in Oldham, Greater Manchester (OL2 7), using pressure testing, tracer gas, acoustic correlation and visual inspection. Leak location: beneath the internal stopcock. Work done: damaged section of pipework replaced with a new section of pipe. Outcome: no pressure drop at 5 bar over 60 minutes after the repair.

- ADI case study 285 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 285 | town | Oldham
- ADI case study 285 | postcode sector | OL2 7
- ADI case study 285 | county | Greater Manchester
- ADI case study 285 | country | England
- ADI case study 285 | leak type | Internal cold mains leak
- ADI case study 285 | service | Water Mains Leak Detection
- ADI case study 285 | service | Internal Leak Detection
- ADI case study 285 | engineer | Paul Hope
- ADI case study 285 | detection method | Pressure Testing
- ADI case study 285 | detection method | Tracer Gas
- ADI case study 285 | detection method | Acoustic Correlation
- ADI case study 285 | detection method | Visual Inspection
- ADI case study 285 | symptom | 1 litre used in just over six minutes with the internal stopcock closed
- ADI case study 285 | system affected | mains water supply
- ADI case study 285 | test result | pressure dropped from 3 bar to zero within two minutes
- ADI case study 285 | test result | tracer gas detected in front of the kitchen sink and nowhere else
- ADI case study 285 | leak location | beneath the internal stopcock
- ADI case study 285 | access made | washing machine moved and flooring lifted
- ADI case study 285 | access made | floorboards cut to expose the leak
- ADI case study 285 | repair | damaged section of pipework replaced with a new section of pipe
- ADI case study 285 | repair | transitional couplings and barrier pipe used
- ADI case study 285 | outcome | no pressure drop at 5 bar over 60 minutes after the repair
- ADI case study 285 | outcome | water supply reinstated and run through all outlets until clear
- ADI case study 285 | recommendation | have a certified joiner refit and finish the kitchen floorboards

## ADI Leak Detection case study 284: underground mains leak in Cockermouth (CA13 9)

Summary: ADI Leak Detection engineer Paul Hope investigated an underground mains leak in Cockermouth, Cumbria (CA13 9), using acoustic correlation, tracer gas, pressure testing and visual inspection. Work done: failed connection coupling replaced. Outcome: no pressure drop at 4 bar over 45 minutes after the repair.

- ADI case study 284 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 284 | town | Cockermouth
- ADI case study 284 | postcode sector | CA13 9
- ADI case study 284 | county | Cumbria
- ADI case study 284 | country | England
- ADI case study 284 | leak type | Underground mains leak
- ADI case study 284 | service | Water Mains Leak Detection
- ADI case study 284 | service | Underground Leak Detection
- ADI case study 284 | engineer | Paul Hope
- ADI case study 284 | detection method | Acoustic Correlation
- ADI case study 284 | detection method | Tracer Gas
- ADI case study 284 | detection method | Pressure Testing
- ADI case study 284 | detection method | Visual Inspection
- ADI case study 284 | symptom | water meter registering approximately 15 litres per minute with all internal stopcocks closed
- ADI case study 284 | symptom | no visible damp areas or damage
- ADI case study 284 | system affected | mains pipework
- ADI case study 284 | pipe material | copper
- ADI case study 284 | test result | no distinct leak profile on an acoustic survey of the driveway
- ADI case study 284 | test result | tracer gas pressure dropped from 3.5 bar to 3 bar after 10 minutes
- ADI case study 284 | test result | tracer gas at the water meter and along the pavement and property boundary line
- ADI case study 284 | leak cause | failed connection coupling
- ADI case study 284 | access made | pipe exposed and traced to the point of failure
- ADI case study 284 | repair | failed connection coupling replaced
- ADI case study 284 | repair | Philmac transitional coupling fitted
- ADI case study 284 | outcome | no pressure drop at 4 bar over 45 minutes after the repair
- ADI case study 284 | outcome | water supply reinstated and excavation backfilled
- ADI case study 284 | recommendation | consider replacing the copper mains pipework during any future driveway renovations
- ADI case study 284 | recommendation | review the building insurance policy for trace and access cover

## ADI Leak Detection case study 282: internal cold mains leak in Liverpool (L12 8)

Summary: ADI Leak Detection engineer Paul Hope investigated an internal cold mains leak in Liverpool, Merseyside (L12 8), using acoustic correlation, acoustic listening, tracer gas, a damp meter, pressure testing and a ground microphone. Leak location: beneath the kitchen floor on the left-hand side. Work done: damaged section of pipe removed and replaced. Outcome: no pressure drop at 4 bar over 45 minutes after the repair.

- ADI case study 282 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 282 | town | Liverpool
- ADI case study 282 | postcode sector | L12 8
- ADI case study 282 | county | Merseyside
- ADI case study 282 | country | England
- ADI case study 282 | leak type | Internal cold mains leak
- ADI case study 282 | service | Water Mains Leak Detection
- ADI case study 282 | service | Internal Leak Detection
- ADI case study 282 | engineer | Paul Hope
- ADI case study 282 | detection method | Acoustic Correlation
- ADI case study 282 | detection method | Acoustic Listening
- ADI case study 282 | detection method | Tracer Gas
- ADI case study 282 | detection method | Damp Meter
- ADI case study 282 | detection method | Pressure Testing
- ADI case study 282 | detection method | Ground Microphone
- ADI case study 282 | symptom | water meter showing continuous usage of 3 litres per hour
- ADI case study 282 | symptom | extensive moisture in kitchen walls, plinths, skirting, tiled floor and lounge dividing wall
- ADI case study 282 | test result | strong leak noise at the internal stopcock, no distinct profile on the floor
- ADI case study 282 | test result | pressure dropped from 3 bar to 2 bar over 20 minutes
- ADI case study 282 | test result | ground microphone with tracer gas identified sounds near the left-hand side of the kitchen
- ADI case study 282 | leak location | beneath the kitchen floor on the left-hand side
- ADI case study 282 | access made | kitchen floor excavated to expose the pipework
- ADI case study 282 | repair | damaged section of pipe removed and replaced
- ADI case study 282 | repair | transitional MDPE coupling with speed fit pipe and socket fitted
- ADI case study 282 | outcome | no pressure drop at 4 bar over 45 minutes after the repair
- ADI case study 282 | outcome | supply reinstated, outlets checked and water meter now stable
- ADI case study 282 | recommendation | use dehumidifiers to assist drying in the kitchen

## ADI Leak Detection case study 279: internal cold mains leak in Aylesbury (HP17 9)

Summary: ADI Leak Detection engineer Mark Jones investigated an internal cold mains leak in Aylesbury, Buckinghamshire (HP17 9), using acoustic correlation, a damp meter, an endoscope camera and flow metering. Leak location: in the screed floor at the utility room doorway area. Work done: short section of 15mm copper pipe replaced. Outcome: no movement on the meter during a 20 minute retest.

- ADI case study 279 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 279 | town | Aylesbury
- ADI case study 279 | postcode sector | HP17 9
- ADI case study 279 | county | Buckinghamshire
- ADI case study 279 | country | England
- ADI case study 279 | leak type | Internal cold mains leak
- ADI case study 279 | service | Water Mains Leak Detection
- ADI case study 279 | service | Internal Leak Detection
- ADI case study 279 | engineer | Mark Jones
- ADI case study 279 | detection method | Acoustic Correlation
- ADI case study 279 | detection method | Damp Meter
- ADI case study 279 | detection method | Endoscope Camera
- ADI case study 279 | detection method | Flow Metering
- ADI case study 279 | property type | detached house over two floors
- ADI case study 279 | symptom | strong acoustic signal by the internal stopcock in the utility room
- ADI case study 279 | system affected | 15mm copper pipe embedded in screed
- ADI case study 279 | pipe material | copper
- ADI case study 279 | test result | initial meter test showed a leak rate of 18 litres per minute
- ADI case study 279 | test result | stopcock on 15mm copper pipe, original location moved when rear extension built
- ADI case study 279 | test result | strong acoustic signal at the current door to the utility room
- ADI case study 279 | leak location | in the screed floor at the utility room doorway area
- ADI case study 279 | access made | vinyl flooring tiles and screed excavated
- ADI case study 279 | repair | short section of 15mm copper pipe replaced
- ADI case study 279 | outcome | no movement on the meter during a 20 minute retest
- ADI case study 279 | recommendation | dry the floor to prevent further damage to embedded copper pipes in the screed

## ADI Leak Detection case study 278: internal cold mains leak in Southampton (SO53 1)

Summary: ADI Leak Detection engineer Mark Jones investigated an internal cold mains leak in Southampton, Hampshire (SO53 1), using acoustic correlation, thermal imaging, tracer gas, a damp meter and pressure testing. Leak location: behind the shower and basin waste pipes within the wall.

- ADI case study 278 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 278 | town | Southampton
- ADI case study 278 | postcode sector | SO53 1
- ADI case study 278 | county | Hampshire
- ADI case study 278 | country | England
- ADI case study 278 | leak type | Internal cold mains leak
- ADI case study 278 | service | Water Mains Leak Detection
- ADI case study 278 | service | Internal Leak Detection
- ADI case study 278 | engineer | Mark Jones
- ADI case study 278 | detection method | Acoustic Correlation
- ADI case study 278 | detection method | Thermal Imaging
- ADI case study 278 | detection method | Tracer Gas
- ADI case study 278 | detection method | Damp Meter
- ADI case study 278 | detection method | Pressure Testing
- ADI case study 278 | property type | detached house over two floors
- ADI case study 278 | symptom | water damage to living room and cloakroom ceilings, stairwell wall and en-suite shower room wall
- ADI case study 278 | symptom | constant flow of water down the living room wall when the water was on
- ADI case study 278 | system affected | 15mm copper pipe
- ADI case study 278 | pipe material | copper
- ADI case study 278 | test result | leak rate of approximately 10 litres per hour with incoming pressure of 7.0 bar
- ADI case study 278 | test result | acoustic signal and tracer gas detected below the en-suite basin
- ADI case study 278 | test result | thermal imaging showed pipes embedded in the wall
- ADI case study 278 | leak location | behind the shower and basin waste pipes within the wall
- ADI case study 278 | access made | ceramic tiles removed and very thick plaster broken open
- ADI case study 278 | access made | waste pipes cut out to reach the leaking pipe

## ADI Leak Detection case study 277: underground water mains leak in Addlestone (KT16 0)

Summary: ADI Leak Detection engineer Mark Jones investigated an underground water mains leak in Addlestone, Surrey (KT16 0), using acoustic correlation, pressure testing, sectional isolation and visual inspection. Leak location: failed pipework in the middle of a redundant site. Work done: failed pipework on the redundant site cut off. Outcome: good flow and water pressure achieved on retest.

- ADI case study 277 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 277 | town | Addlestone
- ADI case study 277 | postcode sector | KT16 0
- ADI case study 277 | county | Surrey
- ADI case study 277 | country | England
- ADI case study 277 | leak type | Underground water mains leak
- ADI case study 277 | service | Water Mains Leak Detection
- ADI case study 277 | service | Underground Leak Detection
- ADI case study 277 | engineer | Mark Jones
- ADI case study 277 | detection method | Acoustic Correlation
- ADI case study 277 | detection method | Pressure Testing
- ADI case study 277 | detection method | Sectional Isolation
- ADI case study 277 | detection method | Visual Inspection
- ADI case study 277 | property type | large park home site with up to 150 buildings
- ADI case study 277 | symptom | failure of the supply to the pumped system
- ADI case study 277 | symptom | two of three booster pumps running continuously, unable to achieve a head of pressure
- ADI case study 277 | symptom | indications of air passing through the pumps
- ADI case study 277 | system affected | pipework to the system expansion vessel
- ADI case study 277 | pipe material | copper
- ADI case study 277 | test result | mains pressure approximately 2.5 bar with a low flow rate
- ADI case study 277 | test result | isolation testing of the pump supply indicated a significant leak
- ADI case study 277 | test result | leak rate of approximately 200 to 500 litres per hour
- ADI case study 277 | leak location | failed pipework in the middle of a redundant site
- ADI case study 277 | access made | failed pipework exposed
- ADI case study 277 | repair | failed pipework on the redundant site cut off
- ADI case study 277 | repair | 2 fittings remade on the copper pipework to the expansion vessel
- ADI case study 277 | repair | temporary repair made to the expansion vessel pipework
- ADI case study 277 | outcome | good flow and water pressure achieved on retest
- ADI case study 277 | outcome | leak on the expansion vessel pipework became much larger under pressure
- ADI case study 277 | recommendation | replace copper pipe at the leak location with external mains type pipework and fittings
- ADI case study 277 | recommendation | renew the copper pipe connection to the system expansion vessel

## ADI Leak Detection case study 276: underground water mains leak in Daventry (NN11 3)

Summary: ADI Leak Detection engineer Mark Jones investigated an underground water mains leak in Daventry, Northamptonshire (NN11 3), using tracer gas, acoustic correlation, visual inspection and sectional isolation. Leak location: under the building directly adjacent to the exterior wall. Work done: MDPE blue water main replaced from inside the back kitchen to the exterior wall.

- ADI case study 276 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 276 | town | Daventry
- ADI case study 276 | postcode sector | NN11 3
- ADI case study 276 | county | Northamptonshire
- ADI case study 276 | country | England
- ADI case study 276 | leak type | Underground water mains leak
- ADI case study 276 | service | Water Mains Leak Detection
- ADI case study 276 | service | Underground Leak Detection
- ADI case study 276 | engineer | Mark Jones
- ADI case study 276 | detection method | Tracer Gas
- ADI case study 276 | detection method | Acoustic Correlation
- ADI case study 276 | detection method | Visual Inspection
- ADI case study 276 | detection method | Sectional Isolation
- ADI case study 276 | property type | large detached house over three floors plus a cellar
- ADI case study 276 | system affected | 25mm blue MDPE water pipe
- ADI case study 276 | system affected | metered water supply running approximately 180 metres from the property boundary
- ADI case study 276 | pipe material | MDPE
- ADI case study 276 | test result | tracer gas at 6.0 bar reached the leak point in five minutes 20 seconds
- ADI case study 276 | test result | 50 litres per hour at 5.5 bar, leak concluded to be close to the property
- ADI case study 276 | test result | gas traces outside the back wall of the back kitchen after approximately one hour
- ADI case study 276 | leak location | under the building directly adjacent to the exterior wall
- ADI case study 276 | access made | gravel path excavated to expose the services entering the building
- ADI case study 276 | repair | MDPE blue water main replaced from inside the back kitchen to the exterior wall
- ADI case study 276 | repair | new pipe section through concrete screed, reconnected to remove the joint under the building
- ADI case study 276 | recommendation | contact the water company to arrange a leak allowance

## ADI Leak Detection case study 275: underground water mains leak in Bexleyheath (DA5 2)

Summary: ADI Leak Detection engineer Mark Jones investigated an underground water mains leak in Bexleyheath, Greater London (DA5 2), using acoustic correlation, tracer gas, pressure testing, flow metering and visual inspection. Leak location: in the lawn adjacent to the property boundary where tracer gas was detected. Work done: lead pipe replaced up to the boundary with 20mm MDPE blue pipe. Outcome: retest indicated a further leak on the pipe outside the property.

- ADI case study 275 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 275 | town | Bexleyheath
- ADI case study 275 | postcode sector | DA5 2
- ADI case study 275 | county | Greater London
- ADI case study 275 | country | England
- ADI case study 275 | leak type | Underground water mains leak
- ADI case study 275 | service | Water Mains Leak Detection
- ADI case study 275 | service | Underground Leak Detection
- ADI case study 275 | engineer | Mark Jones
- ADI case study 275 | detection method | Acoustic Correlation
- ADI case study 275 | detection method | Tracer Gas
- ADI case study 275 | detection method | Pressure Testing
- ADI case study 275 | detection method | Flow Metering
- ADI case study 275 | detection method | Visual Inspection
- ADI case study 275 | property type | detached house over two floors
- ADI case study 275 | symptom | leak of 22 litres per hour reported by the water company
- ADI case study 275 | symptom | excess water near the water meter and boundary, rest of pavement dry
- ADI case study 275 | system affected | lead water pipe running under the boundary wall
- ADI case study 275 | pipe material | lead
- ADI case study 275 | test result | meter test showed a leak rate of 60 litres per hour on arrival
- ADI case study 275 | test result | hydrogen tracing gas reached the leak area after 5 minutes
- ADI case study 275 | leak location | in the lawn adjacent to the property boundary where tracer gas was detected
- ADI case study 275 | access made | area excavated to expose the water pipe
- ADI case study 275 | repair | lead pipe replaced up to the boundary with 20mm MDPE blue pipe
- ADI case study 275 | repair | two universal transition couplings used
- ADI case study 275 | outcome | retest indicated a further leak on the pipe outside the property
- ADI case study 275 | recommendation | contact the water company to repair the leak outside the property

## ADI Leak Detection case study 271: underground water mains leak in Hounslow (TW2 6)

Summary: ADI Leak Detection engineer Mark Pavitt investigated an underground water mains leak in Hounslow, Greater London (TW2 6), using acoustic correlation, a damp meter, pressure testing and visual inspection. Leak location: under the kitchen floor. Work done: section of failed 15mm copper mains supply renewed. Outcome: passed a retest at 4.0 bar of compressed air over one hour.

- ADI case study 271 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 271 | town | Hounslow
- ADI case study 271 | postcode sector | TW2 6
- ADI case study 271 | county | Greater London
- ADI case study 271 | country | England
- ADI case study 271 | leak type | Underground water mains leak
- ADI case study 271 | service | Water Mains Leak Detection
- ADI case study 271 | service | Underground Leak Detection
- ADI case study 271 | engineer | Mark Pavitt
- ADI case study 271 | detection method | Acoustic Correlation
- ADI case study 271 | detection method | Damp Meter
- ADI case study 271 | detection method | Pressure Testing
- ADI case study 271 | detection method | Visual Inspection
- ADI case study 271 | symptom | noise on the water main with no water in use
- ADI case study 271 | symptom | leak evidence and damage on the kitchen walls and floor
- ADI case study 271 | system affected | 15mm copper mains supply pipe
- ADI case study 271 | pipe material | copper
- ADI case study 271 | test result | acoustic irregularity beneath the floor between the kitchen and dining room
- ADI case study 271 | test result | immediate pressure drop and further sound irregularities from the same floor area
- ADI case study 271 | test result | maximum damp meter readings throughout all affected areas
- ADI case study 271 | leak location | under the kitchen floor
- ADI case study 271 | leak location | beneath the floor between the kitchen and dining room
- ADI case study 271 | access made | wooden flooring and screed removed
- ADI case study 271 | repair | section of failed 15mm copper mains supply renewed
- ADI case study 271 | outcome | passed a retest at 4.0 bar of compressed air over one hour
- ADI case study 271 | recommendation | forward the report to the insurance company to arrange remedial works

## ADI Leak Detection case study 268: internal cold mains leak in Lewes (BN10 7)

Summary: ADI Leak Detection engineer Mark Pavitt investigated an internal cold mains leak in Lewes, East Sussex (BN10 7), using acoustic correlation, thermal imaging, a damp meter, visual inspection and pressure testing. Leak location: under the closet WC and hallway floor. Work done: section of failed 15mm copper mains supply renewed. Outcome: tested on completion and all passed.

- ADI case study 268 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 268 | town | Lewes
- ADI case study 268 | postcode sector | BN10 7
- ADI case study 268 | county | East Sussex
- ADI case study 268 | country | England
- ADI case study 268 | leak type | Internal cold mains leak
- ADI case study 268 | service | Water Mains Leak Detection
- ADI case study 268 | service | Internal Leak Detection
- ADI case study 268 | engineer | Mark Pavitt
- ADI case study 268 | detection method | Acoustic Correlation
- ADI case study 268 | detection method | Thermal Imaging
- ADI case study 268 | detection method | Damp Meter
- ADI case study 268 | detection method | Visual Inspection
- ADI case study 268 | detection method | Pressure Testing
- ADI case study 268 | symptom | leak evidence rising through the closet WC floor
- ADI case study 268 | symptom | leak damage on walls, woodwork and flooring in the closet WC and hallway
- ADI case study 268 | system affected | 15mm copper mains supply
- ADI case study 268 | pipe material | copper
- ADI case study 268 | test result | water rising through tiled floor between hallway and closet WC once mains reinstated
- ADI case study 268 | test result | acoustic irregularity from the area where water was rising
- ADI case study 268 | test result | thermal mass from the failed mains supply pooling around localised heating pipework
- ADI case study 268 | leak location | under the closet WC and hallway floor
- ADI case study 268 | leak location | under the central heating pipework
- ADI case study 268 | access made | tiles and screed removed
- ADI case study 268 | repair | section of failed 15mm copper mains supply renewed
- ADI case study 268 | outcome | tested on completion and all passed
- ADI case study 268 | recommendation | contact the insurance company to arrange remedial works and professional drying

## ADI Leak Detection case study 266: internal cold mains leak in Wandsworth (SW19 3)

Summary: ADI Leak Detection engineer Mark Pavitt investigated an internal cold mains leak in Wandsworth, Greater London (SW19 3), using acoustic correlation, tracer gas, a damp meter, pressure testing, visual inspection and sectional isolation. Leak location: inside boxing to the left hand side of the WC. Work done: failed 15mm pushfit elbow repaired. Outcome: repaired mains supply held 4.0 bar of tracer gas over one hour with no drop.

- ADI case study 266 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 266 | town | Wandsworth
- ADI case study 266 | postcode sector | SW19 3
- ADI case study 266 | county | Greater London
- ADI case study 266 | country | England
- ADI case study 266 | leak type | Internal cold mains leak
- ADI case study 266 | service | Water Mains Leak Detection
- ADI case study 266 | service | Internal Leak Detection
- ADI case study 266 | engineer | Mark Pavitt
- ADI case study 266 | detection method | Acoustic Correlation
- ADI case study 266 | detection method | Tracer Gas
- ADI case study 266 | detection method | Damp Meter
- ADI case study 266 | detection method | Pressure Testing
- ADI case study 266 | detection method | Visual Inspection
- ADI case study 266 | detection method | Sectional Isolation
- ADI case study 266 | symptom | severe leak damage throughout the garden room/gym
- ADI case study 266 | symptom | all walls and flooring saturated in the garden room/gym and integral bathroom
- ADI case study 266 | system affected | mains supply
- ADI case study 266 | test result | maximum damp meter readings throughout all areas
- ADI case study 266 | test result | no pressure drop on the hot supply at 4.0 bar over one hour
- ADI case study 266 | test result | gradual pressure drop on the mains supply at 4.0 bar over one hour
- ADI case study 266 | leak location | inside boxing to the left hand side of the WC
- ADI case study 266 | leak cause | failed 15mm pushfit elbow
- ADI case study 266 | access made | boxing to the left hand side of the WC removed
- ADI case study 266 | repair | failed 15mm pushfit elbow repaired
- ADI case study 266 | outcome | repaired mains supply held 4.0 bar of tracer gas over one hour with no drop
- ADI case study 266 | recommendation | contact the insurance company with the report for remedial works and professional drying
- ADI case study 266 | recommendation | further investigation through insurance of high level bathroom damp possibly from the roof

## ADI Leak Detection case study 265: underground water mains leak in Maidstone (ME8 0)

Summary: ADI Leak Detection engineer Mark Pavitt investigated an underground water mains leak in Maidstone, Kent (ME8 0), using tracer gas, acoustic correlation and pressure testing. Leak location: outside the plant room. Work done: new 25mm blue poly supply run from the plant room into the excavation. Outcome: excavation backfilled and mains supply reinstated.

- ADI case study 265 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 265 | town | Maidstone
- ADI case study 265 | postcode sector | ME8 0
- ADI case study 265 | county | Kent
- ADI case study 265 | country | England
- ADI case study 265 | leak type | Underground water mains leak
- ADI case study 265 | service | Water Mains Leak Detection
- ADI case study 265 | service | Underground Leak Detection
- ADI case study 265 | engineer | Mark Pavitt
- ADI case study 265 | detection method | Tracer Gas
- ADI case study 265 | detection method | Acoustic Correlation
- ADI case study 265 | detection method | Pressure Testing
- ADI case study 265 | system affected | 25mm incoming mains supply
- ADI case study 265 | pipe material | black alkathene
- ADI case study 265 | test result | passed a 4.0 bar tracer gas test over one hour on completion
- ADI case study 265 | leak location | outside the plant room
- ADI case study 265 | access made | metal high level boundary fencing removed for 1.5 ton digger access
- ADI case study 265 | access made | excavated around eight 50mm electric cables to 1.8 metres deep, six feet across
- ADI case study 265 | repair | new 25mm blue poly supply run from the plant room into the excavation
- ADI case study 265 | repair | new riser connected externally to the incoming supply and internally to the internal supply
- ADI case study 265 | outcome | excavation backfilled and mains supply reinstated
- ADI case study 265 | recommendation | send the report to the water provider

## ADI Leak Detection case study 264: underground water mains leak in Teddington

Summary: ADI Leak Detection engineer Mark Pavitt investigated an underground water mains leak in Teddington, using acoustic correlation, tracer gas, a ground microphone and pressure testing. Work done: new 20mm blue poly mains riser run to the newly installed stopcock. Outcome: mains supply passed the completion test with no drop in pressure.

- ADI case study 264 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 264 | town | Teddington
- ADI case study 264 | country | England
- ADI case study 264 | leak type | Underground water mains leak
- ADI case study 264 | service | Water Mains Leak Detection
- ADI case study 264 | service | Underground Leak Detection
- ADI case study 264 | engineer | Mark Pavitt
- ADI case study 264 | detection method | Acoustic Correlation
- ADI case study 264 | detection method | Tracer Gas
- ADI case study 264 | detection method | Ground Microphone
- ADI case study 264 | detection method | Pressure Testing
- ADI case study 264 | system affected | incoming mains supply
- ADI case study 264 | test result | tracing cable ran only to the kitchen wall edge, approximately three feet from party wall
- ADI case study 264 | test result | ground penetrating radar showed the supply angling sharply under the electrical consumer unit
- ADI case study 264 | test result | no drop in pressure at 4.0 bar of compressed air on completion
- ADI case study 264 | access made | laminate flooring and screed removed
- ADI case study 264 | access made | screed removed below the consumer unit and area excavated approximately 1 metre deep
- ADI case study 264 | repair | new 20mm blue poly mains riser run to the newly installed stopcock
- ADI case study 264 | repair | connected into the existing 20mm black poly supply in front of the external wall
- ADI case study 264 | outcome | mains supply passed the completion test with no drop in pressure
- ADI case study 264 | recommendation | send the report to the insurers

## ADI Leak Detection case study 263: underground water mains leak in Plymouth (PL4 8)

Summary: ADI Leak Detection engineer Mark Pavitt investigated an underground water mains leak in Plymouth, Devon (PL4 8), using acoustic correlation, tracer gas, a damp meter and pressure testing. Leak location: on the lead mains riser between the closet WC and the outside wall. Work done: mains riser re-piped from the garden under the outside wall into the closet WC. Outcome: mains supply test passed with no drop in pressure.

- ADI case study 263 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 263 | town | Plymouth
- ADI case study 263 | postcode sector | PL4 8
- ADI case study 263 | county | Devon
- ADI case study 263 | country | England
- ADI case study 263 | leak type | Underground water mains leak
- ADI case study 263 | service | Water Mains Leak Detection
- ADI case study 263 | service | Underground Leak Detection
- ADI case study 263 | engineer | Mark Pavitt
- ADI case study 263 | detection method | Acoustic Correlation
- ADI case study 263 | detection method | Tracer Gas
- ADI case study 263 | detection method | Damp Meter
- ADI case study 263 | detection method | Pressure Testing
- ADI case study 263 | system affected | incoming lead mains riser
- ADI case study 263 | pipe material | lead
- ADI case study 263 | test result | combined tests localised the leak area to just in front of the outside wall
- ADI case study 263 | test result | no pressure drop at 4.0 bar of tracer gas over one hour
- ADI case study 263 | leak location | on the lead mains riser between the closet WC and the outside wall
- ADI case study 263 | access made | lead riser exposed under the WC floor
- ADI case study 263 | access made | two sections of garden decking, concrete and bricks removed and the area excavated
- ADI case study 263 | repair | mains riser re-piped from the garden under the outside wall into the closet WC
- ADI case study 263 | repair | length of new 20mm blue poly and two transition fittings added
- ADI case study 263 | outcome | mains supply test passed with no drop in pressure
- ADI case study 263 | recommendation | send the report to the insurers

## ADI Leak Detection case study 262: underground water mains leak in Oxford (OX29 8)

Summary: ADI Leak Detection engineer Mark Pavitt investigated an underground water mains leak in Oxford, Oxfordshire (OX29 8), using acoustic correlation, thermal imaging, tracer gas, a damp meter and pressure testing. Leak location: under the kitchen floor. Work done: failed section of 15mm copper mains supply renewed and lagged. Outcome: completion test passed with no drop in pressure.

- ADI case study 262 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 262 | town | Oxford
- ADI case study 262 | postcode sector | OX29 8
- ADI case study 262 | county | Oxfordshire
- ADI case study 262 | country | England
- ADI case study 262 | leak type | Underground water mains leak
- ADI case study 262 | service | Water Mains Leak Detection
- ADI case study 262 | service | Underground Leak Detection
- ADI case study 262 | engineer | Mark Pavitt
- ADI case study 262 | detection method | Acoustic Correlation
- ADI case study 262 | detection method | Thermal Imaging
- ADI case study 262 | detection method | Tracer Gas
- ADI case study 262 | detection method | Damp Meter
- ADI case study 262 | detection method | Pressure Testing
- ADI case study 262 | symptom | two blown tiles
- ADI case study 262 | system affected | 15mm copper mains supply pipe
- ADI case study 262 | pipe material | copper
- ADI case study 262 | test result | acoustic irregularity under the floor in front of the kitchen sink unit
- ADI case study 262 | test result | maximum damp meter readings throughout the area
- ADI case study 262 | test result | no pressure drop at 4.0 bar of compressed air over one hour on completion
- ADI case study 262 | leak location | under the kitchen floor
- ADI case study 262 | leak location | on top of the concrete beneath the insulation
- ADI case study 262 | access made | a tile removed
- ADI case study 262 | access made | section of chipboard flooring and a thick layer of insulation removed
- ADI case study 262 | repair | failed section of 15mm copper mains supply renewed and lagged
- ADI case study 262 | outcome | completion test passed with no drop in pressure
- ADI case study 262 | recommendation | send the report to the insurance company
- ADI case study 262 | recommendation | contact the insurance company to arrange remedial works and professional drying

## ADI Leak Detection case study 260: underground water mains leak in Bourne End (SL7 3)

Summary: ADI Leak Detection engineer James Hunter investigated an underground water mains leak in Bourne End, Buckinghamshire (SL7 3), using acoustic listening, tracer gas, thermal imaging and pressure testing. Leak location: beneath the kitchen floor. Work done: leak at the compression joint repaired. Outcome: no further issues after the second repair.

- ADI case study 260 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 260 | town | Bourne End
- ADI case study 260 | postcode sector | SL7 3
- ADI case study 260 | county | Buckinghamshire
- ADI case study 260 | country | England
- ADI case study 260 | leak type | Underground water mains leak
- ADI case study 260 | service | Water Mains Leak Detection
- ADI case study 260 | service | Underground Leak Detection
- ADI case study 260 | engineer | James Hunter
- ADI case study 260 | detection method | Acoustic Listening
- ADI case study 260 | detection method | Tracer Gas
- ADI case study 260 | detection method | Thermal Imaging
- ADI case study 260 | detection method | Pressure Testing
- ADI case study 260 | symptom | continuous running water heard inside the property
- ADI case study 260 | symptom | water board could not find the leak and had replaced the external mains
- ADI case study 260 | test result | tracer gas in external mains gave a noise coming up in the kitchen
- ADI case study 260 | test result | leak rate not measurable as community fed property has no water meter
- ADI case study 260 | test result | pressure test difficult as supply feeds three tank fed properties
- ADI case study 260 | leak location | beneath the kitchen floor
- ADI case study 260 | leak location | second leak in the floor found on a return visit
- ADI case study 260 | leak cause | compression joint left in the floor had leaked
- ADI case study 260 | access made | kitchen floor lifted, breaking the tiles
- ADI case study 260 | access made | more of the floor dug out on a return visit
- ADI case study 260 | repair | leak at the compression joint repaired
- ADI case study 260 | repair | second leak repaired on the return visit
- ADI case study 260 | outcome | no further issues after the second repair
- ADI case study 260 | outcome | property suffered a lot of water damage
- ADI case study 260 | recommendation | file with the insurance company to have the remaining work verified
- ADI case study 260 | recommendation | claim back the leak allowance from the water board

## ADI Leak Detection case study 259: underground water mains leak in Gloucester (GL51 4)

Summary: ADI Leak Detection engineer James Hunter investigated an underground water mains leak in Gloucester, Gloucestershire (GL51 4), using acoustic correlation, tracer gas, a damp meter, an endoscope camera, pressure testing and visual inspection. Leak location: underground at the front of the property. Work done: corroded coupling cut out and replaced with new fittings and pipe. Outcome: re-pressure test found no further leaks on the external mains.

- ADI case study 259 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 259 | town | Gloucester
- ADI case study 259 | postcode sector | GL51 4
- ADI case study 259 | county | Gloucestershire
- ADI case study 259 | country | England
- ADI case study 259 | leak type | Underground water mains leak
- ADI case study 259 | service | Water Mains Leak Detection
- ADI case study 259 | service | Underground Leak Detection
- ADI case study 259 | engineer | James Hunter
- ADI case study 259 | detection method | Acoustic Correlation
- ADI case study 259 | detection method | Tracer Gas
- ADI case study 259 | detection method | Damp Meter
- ADI case study 259 | detection method | Endoscope Camera
- ADI case study 259 | detection method | Pressure Testing
- ADI case study 259 | detection method | Visual Inspection
- ADI case study 259 | symptom | sound of continuous running water in the bathroom
- ADI case study 259 | symptom | noise still heard after a plumber isolated the stopcock
- ADI case study 259 | symptom | a lot of water sitting inside the property
- ADI case study 259 | test result | meter spinning continuously and very fast with internal stopcock isolated
- ADI case study 259 | test result | pressure test confirmed a leak
- ADI case study 259 | test result | strong gas reading and leak heard on pipe at front of property
- ADI case study 259 | leak location | underground at the front of the property
- ADI case study 259 | leak cause | underground coupling completely corroded away
- ADI case study 259 | access made | ground dug out to reach the leak
- ADI case study 259 | repair | corroded coupling cut out and replaced with new fittings and pipe
- ADI case study 259 | outcome | re-pressure test found no further leaks on the external mains
- ADI case study 259 | recommendation | send the report to the utility company to claim the leak allowance

## ADI Leak Detection case study 257: internal cold mains leak in Nottingham (NG14 5)

Summary: ADI Leak Detection engineer James Hunter investigated an internal cold mains leak in Nottingham, Nottinghamshire (NG14 5), using acoustic correlation, thermal imaging, tracer gas, a damp meter, pressure testing and visual inspection. Leak location: beneath the utility room floor. Work done: leak under the utility room floor repaired. Outcome: pressure test found no further leaks in the property.

- ADI case study 257 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 257 | town | Nottingham
- ADI case study 257 | postcode sector | NG14 5
- ADI case study 257 | county | Nottinghamshire
- ADI case study 257 | country | England
- ADI case study 257 | leak type | Internal cold mains leak
- ADI case study 257 | service | Water Mains Leak Detection
- ADI case study 257 | service | Internal Leak Detection
- ADI case study 257 | engineer | James Hunter
- ADI case study 257 | detection method | Acoustic Correlation
- ADI case study 257 | detection method | Thermal Imaging
- ADI case study 257 | detection method | Tracer Gas
- ADI case study 257 | detection method | Damp Meter
- ADI case study 257 | detection method | Pressure Testing
- ADI case study 257 | detection method | Visual Inspection
- ADI case study 257 | symptom | continuous noise from pipework with no visible water anywhere
- ADI case study 257 | test result | noise stopped when the internal stopcock was isolated
- ADI case study 257 | test result | pressure test showed a small drop on the cold pipe
- ADI case study 257 | test result | widespread tracer gas in utility room, highest readings under the utility sink
- ADI case study 257 | leak location | beneath the utility room floor
- ADI case study 257 | access made | part of cupboard back removed and area around pipework broken out
- ADI case study 257 | access made | utility room floor lifted
- ADI case study 257 | repair | leak under the utility room floor repaired
- ADI case study 257 | outcome | pressure test found no further leaks in the property
- ADI case study 257 | recommendation | send this report to the insurance company

## ADI Leak Detection case study 256: internal cold mains leak in Farnham (GU9 8)

Summary: ADI Leak Detection engineer James Hunter investigated an internal cold mains leak in Farnham, Surrey (GU9 8), using thermal imaging, tracer gas, a damp meter, an endoscope camera, pressure testing and visual inspection. Leak location: tee piece under the kitchen unit. Work done: leak at the tee piece repaired. Outcome: pressure test confirmed no further leaks in the property.

- ADI case study 256 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 256 | town | Farnham
- ADI case study 256 | postcode sector | GU9 8
- ADI case study 256 | county | Surrey
- ADI case study 256 | country | England
- ADI case study 256 | leak type | Internal cold mains leak
- ADI case study 256 | service | Water Mains Leak Detection
- ADI case study 256 | service | Internal Leak Detection
- ADI case study 256 | engineer | James Hunter
- ADI case study 256 | detection method | Thermal Imaging
- ADI case study 256 | detection method | Tracer Gas
- ADI case study 256 | detection method | Damp Meter
- ADI case study 256 | detection method | Endoscope Camera
- ADI case study 256 | detection method | Pressure Testing
- ADI case study 256 | detection method | Visual Inspection
- ADI case study 256 | symptom | water coming up through the flooring
- ADI case study 256 | symptom | small amounts of water repeatedly noticed under the floor
- ADI case study 256 | test result | water meter showed no signs of usage
- ADI case study 256 | test result | about a bar and a half lost within six minutes of pressure testing
- ADI case study 256 | test result | gas readings under kitchen unit, endoscope camera showed a dripping tee piece
- ADI case study 256 | leak location | tee piece under the kitchen unit
- ADI case study 256 | access made | shelving units removed and back of the cupboard cut out
- ADI case study 256 | repair | leak at the tee piece repaired
- ADI case study 256 | repair | 15mm tee used in the repair
- ADI case study 256 | outcome | pressure test confirmed no further leaks in the property
- ADI case study 256 | recommendation | get the back of the cupboard repaired
- ADI case study 256 | recommendation | use a dehumidifier so the property can dry out

## ADI Leak Detection case study 253: internal cold mains leak in Hemel Hempstead

Summary: ADI Leak Detection engineer Darren Smith investigated an internal cold mains leak in Hemel Hempstead, using acoustic correlation, tracer gas, a damp meter, pressure testing and visual inspection. Leak location: in the hallway, to the left of the damp patch on the wall. Work done: defective section of copper pipework cut out and renewed. Outcome: mains held 4 bar for 30 minutes with no loss of pressure.

- ADI case study 253 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 253 | town | Hemel Hempstead
- ADI case study 253 | country | England
- ADI case study 253 | leak type | Internal cold mains leak
- ADI case study 253 | service | Water Mains Leak Detection
- ADI case study 253 | service | Internal Leak Detection
- ADI case study 253 | engineer | Darren Smith
- ADI case study 253 | detection method | Acoustic Correlation
- ADI case study 253 | detection method | Tracer Gas
- ADI case study 253 | detection method | Damp Meter
- ADI case study 253 | detection method | Pressure Testing
- ADI case study 253 | detection method | Visual Inspection
- ADI case study 253 | symptom | wet floor and left-hand side wall
- ADI case study 253 | symptom | water meter registering continuous usage
- ADI case study 253 | pipe material | copper
- ADI case study 253 | test result | meter usage stopped with internal stopvalve closed
- ADI case study 253 | test result | pressure tests on mains and distribution pipework confirmed leak on internal mains
- ADI case study 253 | test result | large gas trace in hallway, acoustic leak evidence left of damp patch
- ADI case study 253 | leak location | in the hallway, to the left of the damp patch on the wall
- ADI case study 253 | access made | area excavated to expose the leaking copper pipework
- ADI case study 253 | repair | defective section of copper pipework cut out and renewed
- ADI case study 253 | repair | temporary repair to dripping packing gland on the internal stopvalve
- ADI case study 253 | outcome | mains held 4 bar for 30 minutes with no loss of pressure
- ADI case study 253 | outcome | no meter usage in 15 minute check with all isolation valves open
- ADI case study 253 | recommendation | internal stopvalve may need replacing in the near future

## ADI Leak Detection case study 252: underground mains leak in Enfield Town (N14 6)

Summary: ADI Leak Detection engineer Darren Smith investigated an underground mains leak in Enfield Town, Greater London (N14 6), using acoustic correlation, tracer gas, pressure testing and flow metering. Leak location: between the lead mains and an obsolete stopvalve in the back garden. Work done: leaking section cut out and replaced. Outcome: mains held 3 bar for 30 minutes after repair with no loss.

- ADI case study 252 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 252 | town | Enfield Town
- ADI case study 252 | postcode sector | N14 6
- ADI case study 252 | county | Greater London
- ADI case study 252 | country | England
- ADI case study 252 | leak type | Underground mains leak
- ADI case study 252 | service | Water Mains Leak Detection
- ADI case study 252 | service | Underground Leak Detection
- ADI case study 252 | engineer | Darren Smith
- ADI case study 252 | detection method | Acoustic Correlation
- ADI case study 252 | detection method | Tracer Gas
- ADI case study 252 | detection method | Pressure Testing
- ADI case study 252 | detection method | Flow Metering
- ADI case study 252 | symptom | water meter registering about 0.5 litres per hour with all known outlets closed
- ADI case study 252 | symptom | no obvious signs of a leak
- ADI case study 252 | system affected | lead mains pipework
- ADI case study 252 | pipe material | lead
- ADI case study 252 | test result | all pressure lost during 30 minute test at 3 bar
- ADI case study 252 | test result | large tracer gas trace in back garden about 1.5m from the meter
- ADI case study 252 | leak location | between the lead mains and an obsolete stopvalve in the back garden
- ADI case study 252 | access made | back garden excavated to expose the mains pipework
- ADI case study 252 | repair | leaking section cut out and replaced
- ADI case study 252 | repair | 1m of 25mm MDPE used in the repair
- ADI case study 252 | outcome | mains held 3 bar for 30 minutes after repair with no loss
- ADI case study 252 | outcome | excavation back-filled and mains flushed

## ADI Leak Detection case study 249: internal cold mains leak in Coventry (CV5 9)

Summary: ADI Leak Detection engineer Darren Smith investigated an internal cold mains leak in Coventry, West Midlands (CV5 9), using thermal imaging, tracer gas, a damp meter, pressure testing and flow metering. Leak location: hot supply pipe in the hallway outside the bathroom door. Work done: leaking section of copper tube cut out and renewed. Outcome: repaired pipework held 4 bar for 30 minutes with no loss.

- ADI case study 249 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 249 | town | Coventry
- ADI case study 249 | postcode sector | CV5 9
- ADI case study 249 | county | West Midlands
- ADI case study 249 | country | England
- ADI case study 249 | leak type | Internal cold mains leak
- ADI case study 249 | service | Water Mains Leak Detection
- ADI case study 249 | service | Internal Leak Detection
- ADI case study 249 | engineer | Darren Smith
- ADI case study 249 | detection method | Thermal Imaging
- ADI case study 249 | detection method | Tracer Gas
- ADI case study 249 | detection method | Damp Meter
- ADI case study 249 | detection method | Pressure Testing
- ADI case study 249 | detection method | Flow Metering
- ADI case study 249 | symptom | water pooling in cupboard under stairs, hallway and bathroom floors damp
- ADI case study 249 | symptom | combination boiler losing pressure over two weeks
- ADI case study 249 | system affected | hot water supply pipework
- ADI case study 249 | pipe material | copper
- ADI case study 249 | test result | meter registered 6 litres per hour, stopping when internal stop valve closed
- ADI case study 249 | test result | leak found at WC cistern ball valve, then on hot supply pipework
- ADI case study 249 | test result | tracer gas detected almost immediately in hallway outside bathroom door
- ADI case study 249 | leak location | hot supply pipe in the hallway outside the bathroom door
- ADI case study 249 | leak location | ball valve in the WC cistern
- ADI case study 249 | leak cause | apparent physical damage to the pipe during installation
- ADI case study 249 | access made | hallway area excavated to expose the copper tube
- ADI case study 249 | repair | leaking section of copper tube cut out and renewed
- ADI case study 249 | outcome | repaired pipework held 4 bar for 30 minutes with no loss
- ADI case study 249 | outcome | water supply reinstated and pipework flushed
- ADI case study 249 | recommendation | replace the ball valve in the WC cistern
- ADI case study 249 | recommendation | heating loss must reach at least 1.5 bar over 24 hours to be located

## ADI Leak Detection case study 248: underground mains leak in Dunstable (LU6 2)

Summary: ADI Leak Detection engineer Darren Smith investigated an underground mains leak in Dunstable, Bedfordshire (LU6 2), using tracer gas, pressure testing, acoustic listening and visual inspection. Leak location: multiple leaks on mains pipework in access chamber beneath drain cover. Work done: leaking section of mains pipework cut out and renewed. Outcome: internal and external mains held 2.5 bar together for 30 minutes.

- ADI case study 248 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 248 | town | Dunstable
- ADI case study 248 | postcode sector | LU6 2
- ADI case study 248 | county | Bedfordshire
- ADI case study 248 | country | England
- ADI case study 248 | leak type | Underground mains leak
- ADI case study 248 | service | Water Mains Leak Detection
- ADI case study 248 | service | Underground Leak Detection
- ADI case study 248 | engineer | Darren Smith
- ADI case study 248 | detection method | Tracer Gas
- ADI case study 248 | detection method | Pressure Testing
- ADI case study 248 | detection method | Acoustic Listening
- ADI case study 248 | detection method | Visual Inspection
- ADI case study 248 | property type | petrol garage
- ADI case study 248 | symptom | water meter registering 15 litres per minute with all known outlets closed
- ADI case study 248 | system affected | mains pipework running through an access chamber
- ADI case study 248 | test result | all pressure lost almost immediately on 2.5 bar test
- ADI case study 248 | test result | large gas trace and bubbling at drain cover two metres left of stop valve
- ADI case study 248 | leak location | multiple leaks on mains pipework in access chamber beneath drain cover
- ADI case study 248 | access made | drain cover lifted and access chamber emptied of water
- ADI case study 248 | repair | leaking section of mains pipework cut out and renewed
- ADI case study 248 | outcome | internal and external mains held 2.5 bar together for 30 minutes
- ADI case study 248 | outcome | water meter check showed no usage

## ADI Leak Detection case study 247: internal cold mains leak in Wokingham (RG40 2)

Summary: ADI Leak Detection engineer Darren Smith investigated an internal cold mains leak in Wokingham, Berkshire (RG40 2), using acoustic correlation, thermal imaging, tracer gas, a damp meter and pressure testing. Leak location: sink supply pipe at the right-hand wall of the kitchen. Work done: leaking section of pipe cut out and renewed. Outcome: mains held 3 bar for 30 minutes with no loss of pressure.

- ADI case study 247 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 247 | town | Wokingham
- ADI case study 247 | postcode sector | RG40 2
- ADI case study 247 | county | Berkshire
- ADI case study 247 | country | England
- ADI case study 247 | leak type | Internal cold mains leak
- ADI case study 247 | service | Water Mains Leak Detection
- ADI case study 247 | service | Internal Leak Detection
- ADI case study 247 | engineer | Darren Smith
- ADI case study 247 | detection method | Acoustic Correlation
- ADI case study 247 | detection method | Thermal Imaging
- ADI case study 247 | detection method | Tracer Gas
- ADI case study 247 | detection method | Damp Meter
- ADI case study 247 | detection method | Pressure Testing
- ADI case study 247 | symptom | wet laminate kitchen floor and water damage to lower 300mm of walls
- ADI case study 247 | symptom | water meter registering continuous usage
- ADI case study 247 | system affected | mains pipework supplying the kitchen sink
- ADI case study 247 | test result | meter usage stopped with internal stopvalve closed, leak on internal pipework
- ADI case study 247 | test result | tracer gas pressure test confirmed a leak on internal mains supply pipework
- ADI case study 247 | test result | tracer gas detected at the right-hand wall of the kitchen
- ADI case study 247 | leak location | sink supply pipe at the right-hand wall of the kitchen
- ADI case study 247 | access made | area at the right-hand kitchen wall excavated
- ADI case study 247 | repair | leaking section of pipe cut out and renewed
- ADI case study 247 | outcome | mains held 3 bar for 30 minutes with no loss of pressure
- ADI case study 247 | outcome | water supply reinstated and pipework flushed through

## ADI Leak Detection case study 245: underground mains leak in Colnbrook (SL3 8)

Summary: ADI Leak Detection engineer Darren Smith investigated an underground mains leak in Colnbrook, Berkshire (SL3 8), using acoustic correlation, tracer gas, pressure testing and flow metering. Leak location: open ended pipework in the ground at the front of the property. Work done: open end of the old mains pipework capped. Outcome: mains held 3.5 bar for 30 minutes after repair.

- ADI case study 245 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 245 | town | Colnbrook
- ADI case study 245 | postcode sector | SL3 8
- ADI case study 245 | county | Berkshire
- ADI case study 245 | country | England
- ADI case study 245 | leak type | Underground mains leak
- ADI case study 245 | service | Water Mains Leak Detection
- ADI case study 245 | service | Underground Leak Detection
- ADI case study 245 | engineer | Darren Smith
- ADI case study 245 | detection method | Acoustic Correlation
- ADI case study 245 | detection method | Tracer Gas
- ADI case study 245 | detection method | Pressure Testing
- ADI case study 245 | detection method | Flow Metering
- ADI case study 245 | symptom | water meter registering continuous usage of 1 litre per minute
- ADI case study 245 | system affected | old mains pipework left connected to the internal cold supply
- ADI case study 245 | test result | meter usage unchanged with the internal stopvalve closed
- ADI case study 245 | test result | large tracer gas trace at the front of the property
- ADI case study 245 | test result | pressure test after capping the open end showed a second leak
- ADI case study 245 | leak location | open ended pipework in the ground at the front of the property
- ADI case study 245 | leak cause | old mains left connected with an open end when the mains was replaced
- ADI case study 245 | access made | ground excavated at the front of the property
- ADI case study 245 | repair | open end of the old mains pipework capped
- ADI case study 245 | repair | obsolete internal stopvalve found behind boxing removed and pipework capped
- ADI case study 245 | outcome | mains held 3.5 bar for 30 minutes after repair
- ADI case study 245 | outcome | pipework flushed through and excavation backfilled

## ADI Leak Detection case study 241: underground water mains leak in Watford (WD17 4)

Summary: ADI Leak Detection engineer Danny O'Mahony investigated an underground water mains leak in Watford, Hertfordshire (WD17 4), using acoustic correlation, a damp meter, pressure testing, flow metering and visual inspection. Leak location: hole in 15mm copper pipe under the lounge floor screed. Work done: small section of pipe cut out. Outcome: incoming mains held 2.4 bar with no measurable loss for 20 minutes.

- ADI case study 241 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 241 | town | Watford
- ADI case study 241 | postcode sector | WD17 4
- ADI case study 241 | county | Hertfordshire
- ADI case study 241 | country | England
- ADI case study 241 | leak type | Underground water mains leak
- ADI case study 241 | service | Water Mains Leak Detection
- ADI case study 241 | service | Underground Leak Detection
- ADI case study 241 | engineer | Danny O'Mahony
- ADI case study 241 | detection method | Acoustic Correlation
- ADI case study 241 | detection method | Damp Meter
- ADI case study 241 | detection method | Pressure Testing
- ADI case study 241 | detection method | Flow Metering
- ADI case study 241 | detection method | Visual Inspection
- ADI case study 241 | symptom | laminate flooring in the lounge starting to swell
- ADI case study 241 | symptom | heating system losing some pressure, not enough to cause the floor damage
- ADI case study 241 | system affected | incoming mains water pipe
- ADI case study 241 | pipe material | 15mm copper
- ADI case study 241 | test result | 999 moisture readings on lounge wall beside the door to the stairs
- ADI case study 241 | test result | meter recording about 5 to 6 litres per minute, unchanged with internal valve off
- ADI case study 241 | test result | bubbling and escaping air heard in lounge floor behind the TV unit
- ADI case study 241 | leak location | hole in 15mm copper pipe under the lounge floor screed
- ADI case study 241 | access made | laminate flooring cut up and screed below broken up
- ADI case study 241 | repair | small section of pipe cut out
- ADI case study 241 | repair | repaired with copper tube, copper fittings, flux and solder
- ADI case study 241 | outcome | incoming mains held 2.4 bar with no measurable loss for 20 minutes
- ADI case study 241 | outcome | no meter usage over 20 minutes with all pipework reconnected
- ADI case study 241 | recommendation | take professional advice on drying out given wide spread of high moisture

## ADI Leak Detection case study 239: underground water mains leak in Maidstone (ME17 2)

Summary: ADI Leak Detection engineer Danny O'Mahony investigated an underground water mains leak in Maidstone, Kent (ME17 2), using acoustic correlation, tracer gas, pressure testing, a ground microphone and flow metering. Leak location: in the ground outside the kitchen window near the soil stack. Work done: short section cut out and replaced with transition couplings and blue MDPE pipe. Outcome: no pressure loss on low pressure test after second repair.

- ADI case study 239 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 239 | town | Maidstone
- ADI case study 239 | postcode sector | ME17 2
- ADI case study 239 | county | Kent
- ADI case study 239 | country | England
- ADI case study 239 | leak type | Underground water mains leak
- ADI case study 239 | service | Water Mains Leak Detection
- ADI case study 239 | service | Underground Leak Detection
- ADI case study 239 | engineer | Danny O'Mahony
- ADI case study 239 | detection method | Acoustic Correlation
- ADI case study 239 | detection method | Tracer Gas
- ADI case study 239 | detection method | Pressure Testing
- ADI case study 239 | detection method | Ground Microphone
- ADI case study 239 | detection method | Flow Metering
- ADI case study 239 | property type | farmhouse
- ADI case study 239 | symptom | water mains leak reported at 250 litres per hour
- ADI case study 239 | system affected | thin wall steel pipe joined to thicker wall steel main near the house
- ADI case study 239 | pipe material | thin wall steel
- ADI case study 239 | test result | no pressure loss over 15 minutes from meter to new blue MDPE connection
- ADI case study 239 | test result | upper half of pipework to farmhouse and troughs slowly lost pressure
- ADI case study 239 | test result | loudest acoustic signals at same spot as highest tracer gas reading
- ADI case study 239 | leak location | in the ground outside the kitchen window near the soil stack
- ADI case study 239 | leak location | second leak a couple of inches from the first repair
- ADI case study 239 | leak cause | corroded section of steel pipe
- ADI case study 239 | leak cause | lateral fractures in both leaking sections of pipe
- ADI case study 239 | access made | ground dug out to expose the leaking pipe
- ADI case study 239 | repair | short section cut out and replaced with transition couplings and blue MDPE pipe
- ADI case study 239 | repair | first repair removed and steel pipe cut further back towards the property
- ADI case study 239 | outcome | no pressure loss on low pressure test after second repair
- ADI case study 239 | outcome | no water usage at meter over 15 minutes, high pressure test not done
- ADI case study 239 | recommendation | replace steel pipe from the repair into the property as soon as possible

## ADI Leak Detection case study 237: internal cold mains leak in Bovingdon (WD3 8)

Summary: ADI Leak Detection engineer Danny O'Mahony investigated an internal cold mains leak in Bovingdon, Hertfordshire (WD3 8), using thermal imaging, a damp meter, pressure testing, a ground microphone, tracer gas and acoustic listening. Leak location: pinhole on cold water main within bathroom floor screed. Work done: 6 to 8 inch section of pipe replaced with solid copper pipe and fittings. Outcome: repaired cold water main held 3.3 bar for 20 minutes without measurable loss.

- ADI case study 237 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 237 | town | Bovingdon
- ADI case study 237 | postcode sector | WD3 8
- ADI case study 237 | county | Hertfordshire
- ADI case study 237 | country | England
- ADI case study 237 | leak type | Internal cold mains leak
- ADI case study 237 | service | Water Mains Leak Detection
- ADI case study 237 | service | Internal Leak Detection
- ADI case study 237 | engineer | Danny O'Mahony
- ADI case study 237 | detection method | Thermal Imaging
- ADI case study 237 | detection method | Damp Meter
- ADI case study 237 | detection method | Pressure Testing
- ADI case study 237 | detection method | Ground Microphone
- ADI case study 237 | detection method | Tracer Gas
- ADI case study 237 | detection method | Acoustic Listening
- ADI case study 237 | symptom | wooden lounge flooring lifting from screed, wet screed floor beneath
- ADI case study 237 | symptom | dampness and water staining on wall next to radiator
- ADI case study 237 | symptom | sound of running water stopped when main stopcock was turned off
- ADI case study 237 | system affected | cold water main pipework under bathroom floor screed
- ADI case study 237 | test result | complete pressure loss within 5 to 10 minutes at three bar mains pressure
- ADI case study 237 | test result | gurgling noise heard within bathroom floor with ground microphone
- ADI case study 237 | test result | tracer gas escaping at corner of bathroom floor beneath corner unit
- ADI case study 237 | leak location | pinhole on cold water main within bathroom floor screed
- ADI case study 237 | leak cause | apparent mechanical damage at installation leaving mains pipe flattened
- ADI case study 237 | leak cause | earlier lead solder repair over perforation reopened when disturbed
- ADI case study 237 | access made | linoleum cut back, cupboard removed and bathroom screed broken into
- ADI case study 237 | repair | 6 to 8 inch section of pipe replaced with solid copper pipe and fittings
- ADI case study 237 | outcome | repaired cold water main held 3.3 bar for 20 minutes without measurable loss
- ADI case study 237 | outcome | hot water pipe in same location mechanically damaged but not currently leaking
- ADI case study 237 | recommendation | contact insurance company about drying out and remediation works
- ADI case study 237 | recommendation | protect pipework from any concrete laid during floor remediation
- ADI case study 237 | recommendation | replace small damaged section of hot water pipe to reduce future leak risk

## ADI Leak Detection case study 236: underground water mains leak in Banbury (OX17 2)

Summary: ADI Leak Detection engineer Vincent Morgan investigated an underground water mains leak in Banbury, Northamptonshire (OX17 2), using acoustic listening, tracer gas, sectional isolation and pressure testing. Leak location: transition joint where the old pipework joined the new pipework. Work done: leaking joint removed and replaced. Outcome: exposed area backfilled.

- ADI case study 236 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 236 | town | Banbury
- ADI case study 236 | postcode sector | OX17 2
- ADI case study 236 | county | Northamptonshire
- ADI case study 236 | country | England
- ADI case study 236 | leak type | Underground water mains leak
- ADI case study 236 | service | Water Mains Leak Detection
- ADI case study 236 | service | Underground Leak Detection
- ADI case study 236 | engineer | Vincent Morgan
- ADI case study 236 | detection method | Acoustic Listening
- ADI case study 236 | detection method | Tracer Gas
- ADI case study 236 | detection method | Sectional Isolation
- ADI case study 236 | detection method | Pressure Testing
- ADI case study 236 | symptom | external water meter constantly passing water with no water in use
- ADI case study 236 | system affected | underground pipework between the water meter and the internal stopcock
- ADI case study 236 | test result | meter at the driveway entrance passing water at 1 litre in 1 minute
- ADI case study 236 | test result | meter still passing water with the kitchen stopcock isolated
- ADI case study 236 | test result | tracer gas located the leak under a side pathway, where leaking noise was heard
- ADI case study 236 | leak location | transition joint where the old pipework joined the new pipework
- ADI case study 236 | leak location | beneath the side pathway
- ADI case study 236 | repair | leaking joint removed and replaced
- ADI case study 236 | outcome | exposed area backfilled
- ADI case study 236 | recommendation | note the underground black poly pipe is an unusual size