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

7 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 79: underground water mains leak in King's Lynn (PE30 5)

Summary: ADI Leak Detection engineer Ferenc Gulyas investigated an underground water mains leak in King's Lynn, Norfolk (PE30 5), using acoustic correlation, tracer gas, pressure testing and visual inspection. Leak location: 27mm lead pipework under paving slabs. Work done: leaking part replaced with new Philmac fittings. Outcome: retest passed indicating no further leak.

- ADI case study 79 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 79 | town | King's Lynn
- ADI case study 79 | postcode sector | PE30 5
- ADI case study 79 | county | Norfolk
- ADI case study 79 | country | England
- ADI case study 79 | leak type | Underground water mains leak
- ADI case study 79 | service | Water Mains Leak Detection
- ADI case study 79 | service | Underground Leak Detection
- ADI case study 79 | engineer | Ferenc Gulyas
- ADI case study 79 | detection method | Acoustic Correlation
- ADI case study 79 | detection method | Tracer Gas
- ADI case study 79 | detection method | Pressure Testing
- ADI case study 79 | detection method | Visual Inspection
- ADI case study 79 | symptom | water leak noticed somewhere in the property or outside
- ADI case study 79 | symptom | slow movement visible on the water meter
- ADI case study 79 | system affected | external main pipework running next to the building to the back garden
- ADI case study 79 | pipe material | lead
- ADI case study 79 | test result | pressure test on the external, hot and cold pipework indicated a leak
- ADI case study 79 | test result | tracer gas detector identified the leak location in the back garden area
- ADI case study 79 | test result | water pressure measured at 3.5 bar
- ADI case study 79 | leak location | 27mm lead pipework under paving slabs
- ADI case study 79 | access made | paving slabs lifted at the leak location
- ADI case study 79 | repair | leaking part replaced with new Philmac fittings
- ADI case study 79 | repair | 25mm MDPE pipe used
- ADI case study 79 | outcome | retest passed indicating no further leak
- ADI case study 79 | outcome | water pressure restored to working order everywhere

## ADI Leak Detection case study 78: underground water mains leak in East Dereham (NR19 1)

Summary: ADI Leak Detection engineer Ferenc Gulyas investigated an underground water mains leak in East Dereham, Norfolk (NR19 1), using pressure testing, tracer gas, acoustic correlation and visual inspection. Leak location: by the manhole concrete wall. Work done: leaking part replaced with new Philmac fittings. Outcome: retest passed indicating no further leak.

- ADI case study 78 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 78 | town | East Dereham
- ADI case study 78 | postcode sector | NR19 1
- ADI case study 78 | county | Norfolk
- ADI case study 78 | country | England
- ADI case study 78 | leak type | Underground water mains leak
- ADI case study 78 | service | Water Mains Leak Detection
- ADI case study 78 | service | Underground Leak Detection
- ADI case study 78 | engineer | Ferenc Gulyas
- ADI case study 78 | detection method | Pressure Testing
- ADI case study 78 | detection method | Tracer Gas
- ADI case study 78 | detection method | Acoustic Correlation
- ADI case study 78 | detection method | Visual Inspection
- ADI case study 78 | symptom | water board reported a leak of approximately 300 litres a day
- ADI case study 78 | symptom | water board confirmed the leak was external
- ADI case study 78 | symptom | no visible evidence of the leak
- ADI case study 78 | system affected | external main pipework approximately 20m long, partly running under the extension
- ADI case study 78 | pipe material | black poly plastic
- ADI case study 78 | test result | pressure test on the external main pipework indicated a leak
- ADI case study 78 | test result | tracer gas detector identified the leak location next to the drainage manhole
- ADI case study 78 | leak location | by the manhole concrete wall
- ADI case study 78 | leak cause | cracked pipework
- ADI case study 78 | access made | driveway blocks lifted and ground dug out
- ADI case study 78 | repair | leaking part replaced with new Philmac fittings
- ADI case study 78 | repair | 25mm MDPE pipe used
- ADI case study 78 | outcome | retest passed indicating no further leak
- ADI case study 78 | outcome | water pressure restored to working order everywhere

## ADI Leak Detection case study 74: internal cold mains leak in East Dereham (NR19 1)

Summary: ADI Leak Detection engineer Ferenc Gulyas investigated an internal cold mains leak in East Dereham, Norfolk (NR19 1), using thermal imaging, a damp meter, pressure testing, tracer gas and visual inspection. Leak location: 15mm copper pipework exactly under the wall. Work done: leaking parts replaced with new copper pipework. Outcome: retest passed indicating no further leak.

- ADI case study 74 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 74 | town | East Dereham
- ADI case study 74 | postcode sector | NR19 1
- ADI case study 74 | county | Norfolk
- ADI case study 74 | country | England
- ADI case study 74 | leak type | Internal cold mains leak
- ADI case study 74 | service | Water Mains Leak Detection
- ADI case study 74 | service | Internal Leak Detection
- ADI case study 74 | engineer | Ferenc Gulyas
- ADI case study 74 | detection method | Thermal Imaging
- ADI case study 74 | detection method | Damp Meter
- ADI case study 74 | detection method | Pressure Testing
- ADI case study 74 | detection method | Tracer Gas
- ADI case study 74 | detection method | Visual Inspection
- ADI case study 74 | symptom | massive water damage visible on the hallway wall
- ADI case study 74 | system affected | hot water pipework
- ADI case study 74 | pipe material | copper
- ADI case study 74 | test result | very high damp readings where the pipework runs from the bathroom to the kitchen
- ADI case study 74 | test result | internal cold water pipework passed its pressure test
- ADI case study 74 | test result | hot water pipework test indicated a tiny leak somewhere along the line
- ADI case study 74 | leak location | 15mm copper pipework exactly under the wall
- ADI case study 74 | leak location | just the other side of the corridor, where tracer gas gave more tiny readings
- ADI case study 74 | access made | kitchen unit removed and concrete exposed underneath
- ADI case study 74 | access made | vinyl raised up and concrete exposed
- ADI case study 74 | repair | leaking parts replaced with new copper pipework
- ADI case study 74 | outcome | retest passed indicating no further leak
- ADI case study 74 | outcome | water pressure restored to working order everywhere

## ADI Leak Detection case study 66: underground water mains leak in Cricklade (SN15 2)

Summary: ADI Leak Detection engineer Artur Sowa investigated an underground water mains leak in Cricklade, Wiltshire (SN15 2), using acoustic listening, visual inspection and pressure testing. Leak location: beneath the tarmac at the front. Work done: damaged section repaired with two universal fittings and 25mm MDPE pipe. Outcome: pressure test after the repair confirmed no further leaks.

- ADI case study 66 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 66 | town | Cricklade
- ADI case study 66 | postcode sector | SN15 2
- ADI case study 66 | county | Wiltshire
- ADI case study 66 | country | England
- ADI case study 66 | leak type | Underground water mains leak
- ADI case study 66 | service | Water Mains Leak Detection
- ADI case study 66 | service | Underground Leak Detection
- ADI case study 66 | engineer | Artur Sowa
- ADI case study 66 | detection method | Acoustic Listening
- ADI case study 66 | detection method | Visual Inspection
- ADI case study 66 | detection method | Pressure Testing
- ADI case study 66 | symptom | water escaping from the tarmac at the front, surrounding area significantly damp
- ADI case study 66 | system affected | 25mm metal water supply pipe
- ADI case study 66 | pipe material | metal
- ADI case study 66 | test result | water appeared at the tarmac edge about three minutes after the valve was reopened
- ADI case study 66 | test result | strong sound consistent with a leak beneath the tarmac on the acoustic listening device
- ADI case study 66 | leak location | beneath the tarmac at the front
- ADI case study 66 | access made | tarmac removed and ground excavated
- ADI case study 66 | repair | damaged section repaired with two universal fittings and 25mm MDPE pipe
- ADI case study 66 | outcome | pressure test after the repair confirmed no further leaks
- ADI case study 66 | outcome | excavation backfilled and the surface reinstated
- ADI case study 66 | recommendation | contact the insurance provider, as trace and access cover often applies
- ADI case study 66 | recommendation | no further works currently recommended

## ADI Leak Detection case study 49: underground water mains leak in Chesterfield (S41 8)

Summary: ADI Leak Detection engineer Brett Steele investigated an underground water mains leak in Chesterfield, Derbyshire (S41 8), using acoustic correlation, acoustic listening, tracer gas, pressure testing and flow metering. Leak location: beneath the courtyard tarmac patch. Work done: damaged lead supply capped off with a transition coupler and 25mm cap end. Outcome: pressure retest showed no further loss.

- ADI case study 49 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 49 | town | Chesterfield
- ADI case study 49 | postcode sector | S41 8
- ADI case study 49 | county | Derbyshire
- ADI case study 49 | country | England
- ADI case study 49 | leak type | Underground water mains leak
- ADI case study 49 | service | Water Mains Leak Detection
- ADI case study 49 | service | Underground Leak Detection
- ADI case study 49 | engineer | Brett Steele
- ADI case study 49 | detection method | Acoustic Correlation
- ADI case study 49 | detection method | Acoustic Listening
- ADI case study 49 | detection method | Tracer Gas
- ADI case study 49 | detection method | Pressure Testing
- ADI case study 49 | detection method | Flow Metering
- ADI case study 49 | symptom | local water authority detected high water consumption
- ADI case study 49 | system affected | lead mains running across the courtyard to the gents toilet
- ADI case study 49 | system affected | what appeared to be a dead leg on the lead supply
- ADI case study 49 | pipe material | lead
- ADI case study 49 | test result | uncontrolled usage of 1 litre in 30 seconds at the meter with no known demand
- ADI case study 49 | test result | high tracer gas levels emitting from a tarmac patch in the middle of the courtyard
- ADI case study 49 | test result | acoustic profiling raised a concern around the tarmac patch
- ADI case study 49 | leak location | beneath the courtyard tarmac patch
- ADI case study 49 | leak cause | damaged lead supply pipe
- ADI case study 49 | access made | excavation at the courtyard tarmac patch
- ADI case study 49 | repair | damaged lead supply capped off with a transition coupler and 25mm cap end
- ADI case study 49 | outcome | pressure retest showed no further loss
- ADI case study 49 | outcome | no further usage recorded with the mains supply reinstated
- ADI case study 49 | recommendation | if further leaks appear, repipe the gents from within the cellar

## ADI Leak Detection case study 46: underground water mains leak in Swadlincote (DE11 7)

Summary: ADI Leak Detection engineer Brett Steele investigated an underground water mains leak in Swadlincote, Derbyshire (DE11 7), using acoustic correlation, tracer gas, pressure testing and flow metering. Leak location: below the tarmac patch covering a historical repair. Work done: damaged lead pipe cut back and a new transition coupler installed. Outcome: retest at 4 bar with tracer gas showed no pressure loss or uncontrolled meter activity.

- ADI case study 46 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 46 | town | Swadlincote
- ADI case study 46 | postcode sector | DE11 7
- ADI case study 46 | county | Derbyshire
- ADI case study 46 | country | England
- ADI case study 46 | leak type | Underground water mains leak
- ADI case study 46 | service | Water Mains Leak Detection
- ADI case study 46 | service | Underground Leak Detection
- ADI case study 46 | engineer | Brett Steele
- ADI case study 46 | detection method | Acoustic Correlation
- ADI case study 46 | detection method | Tracer Gas
- ADI case study 46 | detection method | Pressure Testing
- ADI case study 46 | detection method | Flow Metering
- ADI case study 46 | symptom | suspected leak causing high water consumption
- ADI case study 46 | symptom | further leak feared on the external supply, a previous leak already repaired
- ADI case study 46 | system affected | original lead supply pipe
- ADI case study 46 | pipe material | lead
- ADI case study 46 | test result | usage of one litre every 90 seconds, unchanged with internal supplies isolated
- ADI case study 46 | test result | instant pressure loss on a tracer gas test at three bar
- ADI case study 46 | test result | high gas readings around a tarmac patch covering a historical repair
- ADI case study 46 | leak location | below the tarmac patch covering a historical repair
- ADI case study 46 | leak location | two transition couplers where a connection to the original lead supply had failed
- ADI case study 46 | leak cause | significant deterioration of the lead pipe at the connection point
- ADI case study 46 | access made | excavation to expose the transition couplers
- ADI case study 46 | repair | damaged lead pipe cut back and a new transition coupler installed
- ADI case study 46 | outcome | retest at 4 bar with tracer gas showed no pressure loss or uncontrolled meter activity
- ADI case study 46 | outcome | repair patch backfilled
- ADI case study 46 | recommendation | new tarmac covering required over the repair patch
- ADI case study 46 | recommendation | replace the whole lead supply if additional leaks occur

## ADI Leak Detection case study 44: internal cold mains leak in Sheffield (S17 4)

Summary: ADI Leak Detection engineer Brett Steele investigated an internal cold mains leak in Sheffield, South Yorkshire (S17 4), using acoustic correlation, thermal imaging, tracer gas, an endoscope camera, pressure testing and flow metering. Work done: leak point cut out and supply capped off. Outcome: tracer gas pressure retest at 6 bar recorded no loss.

- ADI case study 44 | is a | leak detection job carried out by ADI Leak Detection
- ADI case study 44 | town | Sheffield
- ADI case study 44 | postcode sector | S17 4
- ADI case study 44 | county | South Yorkshire
- ADI case study 44 | country | England
- ADI case study 44 | leak type | Internal cold mains leak
- ADI case study 44 | service | Water Mains Leak Detection
- ADI case study 44 | service | Internal Leak Detection
- ADI case study 44 | engineer | Brett Steele
- ADI case study 44 | detection method | Acoustic Correlation
- ADI case study 44 | detection method | Thermal Imaging
- ADI case study 44 | detection method | Tracer Gas
- ADI case study 44 | detection method | Endoscope Camera
- ADI case study 44 | detection method | Pressure Testing
- ADI case study 44 | detection method | Flow Metering
- ADI case study 44 | symptom | suspected supply leak causing high water consumption
- ADI case study 44 | symptom | spike in utility bills
- ADI case study 44 | symptom | leak noise on a 15mm copper pipe behind wall tiles that feeds upstairs
- ADI case study 44 | system affected | old feed that had been capped off further down the line
- ADI case study 44 | pipe material | copper
- ADI case study 44 | test result | meter recorded uncontrolled usage of 1 litre over 1 minute 20 seconds
- ADI case study 44 | test result | greatest suspect leak noise on the cold feed to upstairs
- ADI case study 44 | test result | high tracer gas readings around the floor where the cold feed rises upstairs
- ADI case study 44 | leak cause | pin hole that had emerged in the copper pipe
- ADI case study 44 | access made | section of floor tiles removed around the high gas readings
- ADI case study 44 | access made | additional excavations made to expose the leak
- ADI case study 44 | repair | leak point cut out and supply capped off
- ADI case study 44 | repair | push fit coupler and 15 mm soldered cap end used
- ADI case study 44 | outcome | tracer gas pressure retest at 6 bar recorded no loss
- ADI case study 44 | outcome | no further uncontrolled usage found at this time
- ADI case study 44 | recommendation | dry out the foundations before any remedial works to make good