Leak Detection in London
Worried about a hidden water leak? Our leak detection service in London finds leaks in walls, floors, ceilings and underground pipes before they cause serious damage.
We work in homes and businesses across London, using non-invasive methods such as thermal imaging, acoustic listening and tracer gas to locate the leak accurately, so we only open up where we need to.
Leak detection services in London
EMERGENCY
AVAILABLE 24/7
Burst pipe, active leak or water coming through the ceiling? Our emergency leak detection team is available 24/7 for homes and businesses.
LEAK DETECTION SURVEYS
- Non-invasive leak investigations
- Thermal imaging and acoustic testing
- Plumbing and heating leak detection
- Clear findings and recommendations
LEAK REPAIRS & REMEDIAL WORKS
- Targeted leak repairs
- Plumbing and heating system fixes
- Access with minimal disruption
- Damage prevention and restoration advice
PREVENTATIVE LEAK INSPECTION
- Routine leak detection checks
- Pressure testing and diagnostics
- Spotting faults early
- Reduced risk of future damage
Leak detection for London homes
A hidden leak often shows up as a damp patch, a stained ceiling or a boiler that keeps losing pressure. Our engineers track it down quickly, before it leads to costly repairs or structural damage. Our domestic leak detection covers:
- Finding hidden water leaks in walls, floors and ceilings
- Detecting underground pipe leaks with specialist equipment
- Thermal imaging for non-invasive leak detection
- Moisture and damp assessments
- Leak detection in plumbing and heating systems
- Pressure testing to find weak points in the system
- Tracing and reaching leaks with minimal disruption
- Preventative inspections to stop future leaks
- 24/7 emergency leak detection and repair
Commercial leak detection
We help businesses, landlords and managing agents find leaks in offices, shops and managed buildings accurately, with as little downtime, disruption and damage as possible.
This includes:
- Finding concealed leaks in commercial buildings
- Underground pipe leak detection
- Thermal imaging and acoustic leak detection
- Moisture mapping and damp investigations
- Leak detection in commercial plumbing and heating systems
- Pressure testing and system diagnostics
- Targeted access to keep disruption to a minimum
- Preventative inspections to reduce the risk of future leaks
How we find hidden leaks

Gas
Our Tracer Gas Method introduces a safe, non-toxic gas into your pipework. Our detectors pick up the gas where it escapes, so we can find the source of the leak quickly and accurately.
Learn More

Sound
The Aquaphon Method uses sound to find leaks. With the Aquaphon A200 plumbers' set we listen for the distinctive noise of escaping water, so even the faintest drips can be found.
Learn More
Specialist leak detection equipment
The Tracer Gas Method
Tracer Gas
The Tracer Gas Method is one of the most precise ways to find a leak. We introduce a safe, non-toxic gas into your plumbing system, and it follows the same path as the water, escaping wherever there is a leak.
We then work along the route of the pipework with highly sensitive detectors, which track the movement of the gas step by step until we find exactly where it is coming out.
Once we know where the leak is, we can fix it quickly and only open up the spot that needs repairing, keeping disruption to your property to a minimum. It means even the most stubborn, hard-to-find leaks can be traced and put right efficiently.
The Aquaphon Method
Aquaphon A200
The Aquaphon Method uses sound to find leaks you can’t see. We use the Aquaphon A200 plumbers’ set, a highly sensitive piece of acoustic leak detection equipment that picks up the particular noise water makes as it escapes from a pipe.
Our engineers place sensors at points along your pipework and listen carefully to what they pick up. The equipment can hear very faint sounds, so even small, hidden leaks that would otherwise go unnoticed can be found.
By comparing what we hear at each point, we can pinpoint where the leak is and repair it with as little disruption as possible. You get a clear explanation of what we found and what needs doing.
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.
The Jennings Guarantee
Our six promises to every customer

Clear, competitive pricing
Clear quotes, fair and competitive prices, and no hidden fees. You know what you'll pay.

No call-out fee, free fixed-price quotes
We never charge a call-out fee, so you only pay for our time on the job. Every quote is free, fixed-price and with no obligation.

Qualified, experienced engineers
Qualified, experienced tradespeople, regularly assessed to make sure every job meets our high standards.

Tidy, honest and reliable
We treat your property with respect, keep the work area clean and tidy, and do what we say we will, from start to finish.

Work guaranteed for up to 18 months
All our work is backed by a guarantee of up to 18 months, so you can be confident it's been done properly.

New boiler warranties up to 18 years
Get up to 18 years’ warranty on new boiler installations, covering parts and labour with trusted protection.
Need leak detection equipment?
Our shop on Lupus Street in Pimlico stocks leak detection, plumbing 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