Water Leak Detection in London
Hidden leaks found without tearing up your home
Our water leak detection service in London finds hidden leaks in walls, floors, ceilings and underground supply pipes. You might notice a damp patch, a stained ceiling or a water bill that is suddenly higher than usual. Our engineers use thermal imaging, acoustic equipment, tracer gas and moisture mapping to pinpoint the leak, so we only open up the spot that needs repairing. It is part of our wider leak detection service, and we also offer commercial leak detection for businesses and managed buildings.
How we find and fix water leaks
EMERGENCY:
AVAILABLE 24/7
Water coming through the ceiling or a burst pipe? Our emergency team is available 24/7 to find the leak, stop the water and make the area safe.
THERMAL IMAGING & MOISTURE
- Thermal cameras trace hot water pipes
- Underfloor heating leaks located
- Moisture mapping shows the wet area
- No damage to walls or floors
ACOUSTIC & TRACER GAS
- Aquaphon A200 acoustic leak detection
- Listening for escaping water
- Safe tracer gas for tiny leaks
- Buried and underground pipes traced
LEAK REPAIR & PREVENTION
- Repairs by our own plumbers
- Only opening up where needed
- Checks on pipework and fittings
- Advice to stop future leaks
Our water leak detection methods
- Thermal imaging and moisture mapping: A thermal camera shows temperature differences behind surfaces, which is ideal for tracing hot water and heating pipes. Moisture meters then map how far the damp has spread.
- Acoustic leak detection: With the Aquaphon A200 we listen along the pipe route for the particular sound of water escaping under pressure, even through floors and screed.
- Tracer gas: For the smallest or hardest-to-find leaks, we introduce a safe, non-toxic tracer gas into the pipework and use a sensitive detector to find where it comes out.
Signs you may have a hidden leak
Hidden leaks rarely announce themselves. Look out for damp patches or peeling paint, a musty smell, warm spots on the floor, the sound of running water when every tap is off, or a water meter that keeps turning. A boiler that keeps losing pressure can point to a leak on the heating system. The sooner a leak is found, the less damage it does. If you have noticed any of these signs, contact us to book a leak detection visit.
Areas we cover
From busy city hubs to peaceful suburban neighborhoods, we’ve got London covered. Our expert property maintenance services ensure your home or business stays in top condition, no matter where you are in Greater London.
Why choose Jennings?
- Clear, competitive pricing
- No call-out fee, free fixed-price quotes
- Qualified, experienced engineers
- Tidy, honest and reliable
- Work guaranteed for up to 18 months
- Covering homes and businesses across London
Need plumbing supplies?
Our shop on Lupus Street in Pimlico stocks quality plumbing, heating and electrical supplies from trusted brands. Tradespeople and DIYers are both welcome, and our team is always happy to give advice.
See what our valued customers have to say
EXCELLENT
Based on 323 reviews
Posted on Google![]()
Uncovered - The Electric Rock ExperienceTrustindex verifies that the original source of the review is Google.
Amazing as always!Posted on Google![]()
Bronnie BaynesTrustindex verifies that the original source of the review is Google.
Amazing communication and good availability. plumber was extremely professional and arrived on time. Wish there was a bit more transparency on additional payments ie. parking and sealant.Posted on Google![]()
Sue DaviesTrustindex verifies that the original source of the review is Google.
Jennings are incredibly efficient and helpful. They’ve completed my boiler service and organised the necessary plumbing and electrical certifications . Great after sales service.Posted on Google![]()
Diana GouldTrustindex verifies that the original source of the review is Google.
Excellent job. Solved a long standing problem quickly and effectively. 100% recommend 👍Posted on Google![]()
Paul GrecianTrustindex verifies that the original source of the review is Google.
What a fantastic company! From my first conversation with Sian to installation of my new Vaillant boiler they have been absolutely brilliant. Sian responded instantly via What's App when ever I had a question regarding pricing and installation. Sam the installer and his colleague with very friendly, professional, tidy and talked me through the full installation once completed. I have already given contact details to some of my work colleague's this morning. I will use them to service my boiler going forward in the future and for any other plumbing needs. Absolutely 1st Class Company!Posted on Google![]()
Brenda ZangTrustindex verifies that the original source of the review is Google.
Excellent service from start to finish. Had a new boiler installed and a full power flush carried out. Everything was done professionally, efficiently, and to a very high standard. The team were friendly, tidy, and kept us informed throughout. Highly recommend!Posted on Google![]()
Sam HarveyTrustindex verifies that the original source of the review is Google.
Easily one of the best experiences I’ve had with tradesmen. Sian was super friendly and helpful, and then Harry showed up early, fixed the issue promptly and was a legend! Highly recommended.Posted on Google![]()
Joe CarreiroTrustindex verifies that the original source of the review is Google.
Service was professional and friendlyPosted on Google![]()
Olive Tree HouseTrustindex verifies that the original source of the review is Google.
I’ve been dealing with ongoing pump issues for as long as I can remember, and after multiple visits from different plumbers, nothing ever fully got resolved. Harry from Jennings was the first to actually diagnose the problem and sort it in one visit. Professional, efficient, and clearly knows his craft inside out. I couldn’t recommend Jennings more highly.Posted on Google![]()
Stella OforiTrustindex verifies that the original source of the review is Google.
Tristan was very polite, friendly and very professional. He is also very good at his job and very efficient. Very happy with the service