Water Leak Detection and Repair in Llantwit Major
Water leak detection finds hidden leaks in Llantwit Major using acoustics, thermal imaging and tracer gas. Persistent damp under flooring, unexplained meter advances or a heating circuit needing frequent refilling can indicate a leak.
ADI Leak Detection Llantwit Major covers domestic and commercial properties in the town and Boverton.
- Detecting leaks since 2011
- Guaranteed plumbing, heating and mains repairs
- WaterSafe approved contractor
- Non-invasive leak detection
- Acoustic, thermal and tracer gas
- Trace and access claim reports
What does leak detection in Llantwit Major include?
An ADI Leak Detection Llantwit Major engineer traces the leak from the surface and marks it before anything is dug up. You get a written report for your insurer, and we repair plumbing, heating, water mains and swimming pool leaks.
- Non-invasive methods: The leak is traced from the surface, so walls, floors, tiles and driveways are opened only at the marked point, and only if you want the leak repaired.
- Acoustic listening: Ground microphones pick up the sound of water escaping beneath the surface.
- Thermal imaging: The camera reads the heat pattern of a hot water leak through plaster and screed.
- Tracer gas: Hydrogen tracer gas is introduced into the isolated pipe and detected at the surface above the escape, through screed, timber, tile or ground.
- Moisture meters: Pin and pinless meters measure the spread of damp around a leak, separating a live leak from an old stain.
- Trace and access report: Every investigation ends with a written report by the engineer who attended, with photographs and video, written for trace and access and escape of water claims.
- Find and fix: Plumbing, heating, water mains and swimming pool leak repairs are guaranteed; roof and structural causes are located and reported in full.
- WaterSafe approved: ADI Leak Detection is a WaterSafe approved contractor.
How do ADI Leak Detection engineers find a hidden leak?
Each engineer carries tracer gas, acoustic listening, thermal imaging, moisture meters and borescope cameras.
What does an ADI Leak Detection Llantwit Major engineer bring to the job?
- The equipment: used to find your leak before any wall or floor is opened.
- The company: ADI Leak Detection provides leak detection in Llantwit Major.
- The reviews: 1,658 Trustpilot reviews, as of November 2026.
What are the signs of a hidden water leak?
Each sign below points to a different kind of leak, and to the investigation that finds it.
| Symptoms | What it usually is | The leak detection investigation |
|---|---|---|
| Boiler losing pressure and needing topping up | What it usually isUsually a leak on the heating circuit under a floor or in a wall, sometimes a failed valve or expansion vessel | Central heating leak detection |
| Water bill up, or the meter turning with everything off | What it usually isUsually a supply pipe leak between the boundary stop tap and the house | Water mains leak detection |
| A wet patch on the drive, or a lawn that stays green in a dry spell | What it usually isUsually an underground supply pipe leak tracking along the trench | Water mains leak detection |
| A damp patch on a wall or floor with no obvious source | What it usually isOften a hot or cold pipe leak in the fabric of the building | Hot and cold pipe leak detection |
| A stain spreading across a ceiling | What it usually isUsually a bathroom above, a pipe above, or the roof | Ceiling leak detection |
| A shower or wet room that leaks into the room below | What it usually isUsually a tray, former, seal or trap failure | Bathroom leak detection |
| Pool level dropping faster than evaporation explains | What it usually isUsually the liner, the pipework or the structure | Swimming pool leak detection |
| Water coming in after rain only | What it usually isUsually the roof covering, the flashing or the gutters | Roof leak detection |
| Smells, sinking ground or repeat blockages | What it usually isOften a cracked or displaced drain | Drainage leak investigation |
| A sprinkler zone losing pressure | What it usually isUsually the irrigation pipework, often where it passes under a path | Irrigation leak detection |
Which leak detection service does your leak need?
If you are unsure which one you need, describe your leak when you call and the advisor will tell you.
Water mains leak detection traces the supply pipe from the boundary stop tap to the house through tarmac, block paving, soil and concrete.
- Methods
- Acoustic ground microphones, tracer gas, pressure testing
Central heating leak detection traces pressure loss through heating pipework hidden under floors, screed or plaster.
- Methods
- Tracer gas, thermal imaging, pressure testing
Acoustic listening and thermal imaging locate plumbing leaks inside walls, under floors and above ceilings before opening up.
- Methods
- Acoustic listening, thermal imaging, tracer gas, borescope
Bathroom leak detection tests shower trays, wet room formers, sealed joints and the pipework behind them.
- Methods
- Thermal imaging, moisture meters, borescope
Ceiling leak detection traces a ceiling stain back to the leaking roof, bathroom or pipe.
- Methods
- Thermal imaging, moisture meters, acoustic listening
Swimming pool leak detection tests the liner, filtration pipework, pumps and pool structure one system at a time.
- Methods
- Tracer gas, pressure testing, dye testing, underwater inspection
Roof leak detection checks slate, tile, flashing, gutters and flat roof membranes from the ground, roof and air.
- Methods
- Thermal imaging, moisture meters, drone inspection
A drain camera inspects foul and surface water drains from the chamber out.
- Methods
- CCTV drain survey, acoustic listening
Irrigation leak detection tests sprinkler and garden irrigation networks zone by zone without trenching the lawn.
- Methods
- Acoustic ground microphones, tracer gas, pressure testing
Is leak detection covered by insurance in Llantwit Major?
Most buildings policies include trace and access cover, which pays for finding the source of an escape of water and for the damage caused getting to it. Check your policy for the trace and access limit, because limits vary.
The engineer who found the leak writes your report, with photographs and video for your insurer. The claim itself is yours to make: we do not handle it, and a leak on the street side of the boundary may need a call to Dŵr Cymru Welsh Water instead.
What do customers say about ADI Leak Detection?
Trustpilot reviews describe ADI Leak Detection’s work in the customers’ own words.
Gentleman was very polite, found the leak with no problem very helpful, tidy and did the job that was required there and then. Couldn’t fault the gentleman at all. Would highly recommend
- Date
- 15 October 2026
Super professional service. Extremely satisfied
- Date
- 15 September 2026
Keeping us informed every step of the way,very friendly and overall did a good job .
- Date
- 15 September 2026
Polite, professional and expert leak detection. Friendly and helpful support service.
- Date
- 8 August 2026
Really helpful explaining what work was needed and then fixing the issue.
- Date
- 30 July 2026
I did not need to go ahead with the job, but l found the response was fast, and the people l dealt with polite, friendly and very helpful.
- Date
- 10 July 2026
Which accreditations does ADI Leak Detection hold?
-
CIPHEADI Leak Detection is an accredited company of the Chartered Institute of Plumbing and Heating Engineering (CIPHE).
- Scheme
- Chartered Institute of Plumbing and Heating Engineering (CIPHE)
- Status
- An accredited company
-
WIAPSADI Leak Detection is registered with the Water Industry Approved Plumbers' Scheme (WIAPS).
- Scheme
- Water Industry Approved Plumbers' Scheme (WIAPS)
- Status
- Registered
-
WaterSafeADI Leak Detection is a WaterSafe approved contractor.
- Scheme
- WaterSafe
- Status
- An approved contractor
-
SPATAADI Leak Detection is a SPATA member.
- Scheme
- SPATA, the Swimming Pool and Allied Trades Association
- Status
- A member
-
CSCSSome ADI Leak Detection engineers hold Construction Skills Certification Scheme (CSCS) cards.
- Scheme
- Construction Skills Certification Scheme (CSCS)
- Status
- Some engineers hold CSCS cards
Where does ADI Leak Detection Llantwit Major work?
Llantwit Major’s council appraisal attributes many modest cottages to the period between 1750 and 1900 and records substantial twentieth-century expansion. The town-centre account describes traditional stone cottages along narrow streets. The team investigates the present building layout and the water-loss symptoms reported. Explain moved bathrooms, extensions and changes to accessible supply controls.
Plans or maintenance records can help describe a route concealed by later alterations, while access to adjoining rooms helps follow damp beyond its visible edge. The appraisal places Llantwit Major’s greatest twentieth-century growth east of the historic core.
Within the conservation area it records render or local limestone and a varied roofscape, while Church Street and Wine Street retain evidence of former commercial buildings before the shift towards East Street.
- Boverton CF61
Map of Llantwit Major, the area our engineers cover
The map comes from Google Maps, which may set its own cookies, so it loads only when you ask for it.
How do you book a Llantwit Major leak survey?
Call 01446 349023, Monday to Friday, 7:30am to 6:30pm, or send the form and a technical advisor will call you back.
Llantwit Major enquiries include the verified eastern suburb of Boverton in CF61. Give the property entrance and describe the affected room or connection, including access through any shared space along the suspected water route.
If water is actively running, isolate the stop tap. Take a meter reading now and another in an hour: the rate of loss helps the advisor pick the right survey first time.
Same or next day depending upon engineer availability.
What do people ask before they book a leak survey?
What happens when you call ADI Leak Detection about a leak?
ADI Leak Detection Llantwit Major discusses properties in the town and Boverton. Explain the particular building and the accessible rooms, fittings or shared areas needed to follow the suspected water escape beyond its visible symptoms.
Why does my boiler keep losing pressure?
Your boiler keeps losing pressure because water is escaping from the sealed heating system. The water leaves through a leak on the heating pipework or a radiator, often out of sight under a floor, or through a boiler fault, such as a failed expansion vessel that makes the pressure relief valve discharge water outside. If a heating engineer has ruled out the boiler, central heating leak detection finds the hidden leak with tracer gas, thermal imaging and zone by zone pressure testing.
Does ADI Leak Detection fix the leak as well as find it?
Yes. Leak repairs cover plumbing, central heating, water mains and swimming pools, with every repair guaranteed. ADI Leak Detection Llantwit Major locates and reports roof and structural leaks for a roofer and does not carry out roofing work.
Should I call ADI Leak Detection Llantwit Major or Dŵr Cymru Welsh Water?
Leaks on public land, and on Dŵr Cymru Welsh Water’s side of the boundary stop tap, are Dŵr Cymru Welsh Water’s to fix and should be reported to them. Leaks inside the property, and on your own supply pipe between the boundary and the house, are the property owner’s responsibility, and that is the work we do. Report a leak to Dŵr Cymru Welsh Water on 0800 052 0130, 24hrs a day, 7 days a week, or online at dwrcymru.com.
