Calls us 24/7, 365 days a year

Water Leak Detection
in London & the Home Counties.

Using thermal imaging, acoustic surveys, and tracer gas testing, our specialists pinpoint hidden leaks fast — without unnecessary damage to your property.

Book A PrimeFix Leak Detection Engineer

Book A PrimeFix Leak Detection Engineer
Starting from £60/half hour

Non-destructive water leak detection​

Most leaks don’t start with a flood. They often show up as a higher water bill, damp patches, or a boiler that keeps losing pressure. By the time water is visible, it may already have caused hidden damage.

That’s why we use specialist detection equipment first. Thermal imaging, acoustic technology, and tracer gas help pinpoint leaks with minimal disruption. Once the source is confirmed, we explain the problem, recommend the repair, and can provide a report for insurance claims if needed.

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yusra ibrahim profile picture
yusra ibrahim
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Great service! We had a leak in the middle of the night and called Primefix around midnight. The job was booked straight away, and the engineer arrived in less than an hour. Aurel inspected our bathroom, quickly found the source of the leak, and fixed it on the first visit. He saved us a lot of trouble and kept the damage to a minimum. Highly recommended! Primefix will definitely be my go to company from now on.
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Vinobha Yoganathan profile picture
Vinobha Yoganathan
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Had a leak in our bathroom and PrimeFix Group sorted it out quickly. Professional, reliable and got the job done without any hassle. Highly recommend to anyone needing a trustworthy plumber

Owner's reply
Hi Vinobha, We want to thank you for the positive feedback and are delighted that our engineer found the leak in your bathroom. Much appreciated.
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Richard Sirakov profile picture
Richard Sirakov
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
We had a leak in the kitchen ceiling ,Aurel came and resolve the issue within a day. Very professional team. Highly recommended.

Owner's reply
Hi Richard, We want to thank you for your support and positive feedback. We’ll make sure to pass on your kind words to the engineer.
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Yoanna Kusheva profile picture
Yoanna Kusheva
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
We had No hot water on Sunday evening . Matt From PrimeFix came for rescue and fix our boiler with No time. I would recommend Prime Fix to our friends and family. Thank You

Owner's reply
Hi Yoanna, We’re delighted that Mat managed to bring the hot water back and we appreciate your positive feedback.
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Thinesh K profile picture
Thinesh K
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Great service and will highly recommend

Owner's reply
Hi there Thinesh, We’re glad you had a great service and thank you for the recommendation.
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Gnana Kanda profile picture
Gnana Kanda
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Losing over 40 litres of water a day. Previous firm sent two Engineers daily, cost thousands, never found the leak. PrimeFix sent one engineer the same day I booked. James was brilliant, found it in a couple of hours and left a detailed written report with photos for insurance. That is the difference between a bill and a result

Owner's reply
Thanks so much for your kind review really glad James got to the bottom of the leak quickly and left you a proper report , we will pass this to James Thanks for choosing PrimeFix
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ipek yusuf profile picture
ipek yusuf
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Absolutely fantastic work. Quote was given promptly and honestly, the level of dedication to the job is unmatched. 100% would recommend.

Owner's reply
Thanks so much , Ipek! Really glad the quote was straightforward and the dedication to the job showed through.Thanks so much for the recommendation.
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Chimen Hussein profile picture
Chimen Hussein
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
In all honesty I am really chuffed :-) I have never in all of my 58 years seen such a hard working young man to the tea👌he knows exactly what he is doing, and is very professional and respectful. I would 101 % recommend. The work that he has carried out in one day is remarkable. My bath was on the verge of collapsing due to an unseen leak. My bathroom is comming back to life! Thank you G and D :-) forever greatfull.

Owner's reply
Thank you so much for this lovely review! Really glad the leak was caught in time and your bathroom’s back on track . We’ll pass this on to the engineers. Thanks for trusting us.
Posted on Google Google
Xavier B. Mayer profile picture
Xavier B. Mayer
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Excellent experience : — highly competent — pro-active and reactive — always available — prompt and responsive — solution finder and reliable team My leak was very tricky to uncover. They went methodically, and found the answer. Well done team ! 👏🏻👏🏻👏🏻👏🏻

Owner's reply
Hi Xavier, Thank you so much for your kind words and for taking the time to leave us such a great review.We really appreciate it
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erina profile picture
erina
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Great work! Highly recommend, Fast service and charges reasonable amount. Excellent and came with promised support for future wise.

Owner's reply
Hi Erina, We’re delighted to hear that you were left satisfied and we want to thank you for your positive feedback

Non-destructive methods

We locate the source of your leak without tearing up floors or opening walls unnecessarily.

No hidden fees, ever

Rates start from £120 per hour — no parking, ULEZ, or congestion charges passed on. You'll know the cost upfront.

Insurer-accepted reports

Every investigation produces a detailed technical report accepted by all major insurers for trace and access claims.

Talk to a Leak Detection Specialist Today

Every quote is confirmed in writing before any work starts — no call-out fee, no parking or ULEZ surcharges, no surprises on the invoice. All work is backed by an 18-month workmanship guarantee.


How We Track Down Leaks Without Tearing Your Home Apart

Every job follows the same process, in the same order. We don’t guess, and we don’t open anything up until we’re certain. Here’s the equipment behind every investigation.

Water Leak Detection

Pressure Test

A boiler or system that keeps losing pressure with nothing visibly wrong is often the first clue. We isolate the circuit, bring it up to a controlled test pressure, and narrow down the fault area — usually inside the hour.

Thermal imaging water leak detection

Thermal Imaging

Water moving behind a wall or under a floor changes the surface temperature just enough for an infrared camera to pick it up. No tiles lifted, no plaster opened. The camera does the searching first.

Water Leak Detection

Moisture Readings

A soft patch of floor, a stain that keeps returning, a ceiling mark with no roof leak to explain it. Moisture readings tell us how far it's spread and point us toward the source.

Water Leak Detection

Acoustic Tracing

Escaping water under pressure has its own sound signature. Ground mics and pipe-correlation equipment pick it up, even underground or behind finished walls.

Water Leak Detection

Gas Trace

For the leaks that won't show up any other way, a safe hydrogen-nitrogen mix is fed into the system and followed with sensitive detectors until it reaches the exact point of escape. It'sour most precise method, reserved for the hardest cases.

Transparent Water Leak Detection Pricing, Always

Every quote is confirmed in writing before work starts. No call-out fee. No hidden charges.

CALL-OUTS & REPAIRS

Half-Hour Rates

Charged in 30-minute increments 1h after arrival. No call-out fee. From £120 +VAT for the first hour.

ACCOUNT CLIENTS

Portfolio Pricing

Discounted rates for landlords, HMOs, and managing agents with multiple properties. Dedicated account manager included.

No hidden extras: no parking, fuel, ULEZ, or Congestion Charge surcharges. Materials at trade cost plus 30% markup, fully itemised on the invoice.
Account-client portfolios receive discounted rates from the published prices.

Meet the Prime Fix Water Leak Detection Specialists

Real engineers, real qualifications — the same trusted faces who’ll be at your door, not a subcontractor you’ve never met.

John Mayer | 9+ Years Experience

Gas Safe Registered NVQ Level 3 Plumbing & Heating ACS CCN1 & CENWAT Qualified G3 Unvented Hot Water Certified

“Most engineers chase symptoms. I trace faults back to the actual cause, so customers aren’t calling me back out for the same problem two months later.”

Chris V | 12+ Years Experience

NVQ Level 2 Drainage Construction CSCS Card OS19X CCTV Drainage Survey Qualified

“Most drainage problems aren’t where they first appear. A blockage at one end can be hiding a collapsed pipe further down the line. That’s why getting the camera in early saves everyone time and money.”

Arber J | 25+ Years Experience

NVQ Level 2 & 3 Fully Qualified Electrician Inspection & Testing Qualified PAT Testing Qualified

“There’s not much I haven’t come across after this long in the trade — I take pride in getting it right first time, every time.”

JAMES MCLEAN | 17+ YEARS EXPERIENCE

NVQ LEVEL 2 PLUMBING THERMAL IMAGING CERTIFIED ACOUSTIC & TRACER GAS LEAK DETECTION TRACE & ACCESS REPORTING SPECIALIST

“Finding a leak isn’t about luck or opening up walls. It’s about the right equipment and a methodical process. Get that right and the leak has nowhere to hide.”

AUREL DARA | 15+ YEARS EXPERIENCE

NVQ LEVEL 3 PLUMBING & HEATING QUALIFIED SINCE 2011 LUXURY BATHROOM INSTALLATION SPECIALIST WRAS APPROVED PLUMBER

“A luxury bathroom is only as good as what’s behind the tiles. I build every installation to last, so the finish stays perfect for years.”

Arron H | 15+ years experience

Gas Safe Registered NVQ Level 2 Fully Qualified Plumber

“With 15 years in the trade, I’ve usually got a good idea what’s going on before I’ve even picked up the equipment.”

John Mayer | 9+ Years Experience

Gas Safe Registered NVQ Level 3 Plumbing & Heating ACS CCN1 & CENWAT Qualified G3 Unvented Hot Water Certified

“Most engineers chase symptoms. I trace faults back to the actual cause, so customers aren’t calling me back out for the same problem two months later.”

Arron H | 15+ years experience

Gas Safe Registered NVQ Level 2 Fully Qualified Plumber

“With 15 years in the trade, I’ve usually got a good idea what’s going on before I’ve even picked up the equipment.”

JAMES MCLEAN | 17+ YEARS EXPERIENCE

NVQ LEVEL 2 PLUMBING THERMAL IMAGING CERTIFIED ACOUSTIC & TRACER GAS LEAK DETECTION TRACE & ACCESS REPORTING SPECIALIST

“Finding a leak isn’t about luck or opening up walls. It’s about the right equipment and a methodical process. Get that right and the leak has nowhere to hide.”

Arber J | 25+ Years Experience

NVQ Level 2 & 3 Fully Qualified Electrician Inspection & Testing Qualified PAT Testing Qualified

“There’s not much I haven’t come across after this long in the trade — I take pride in getting it right first time, every time.”

AUREL DARA | 15+ YEARS EXPERIENCE

NVQ LEVEL 3 PLUMBING & HEATING QUALIFIED SINCE 2011 LUXURY BATHROOM INSTALLATION SPECIALIST WRAS APPROVED PLUMBER

“A luxury bathroom is only as good as what’s behind the tiles. I build every installation to last, so the finish stays perfect for years.”

Chris V | 12+ Years Experience

NVQ Level 2 Drainage Construction CSCS Card OS19X CCTV Drainage Survey Qualified

“Most drainage problems aren’t where they first appear. A blockage at one end can be hiding a collapsed pipe further down the line. That’s why getting the camera in early saves everyone time and money.”

Wherever you are, whatever your leak, our standards remain the same

Book a Prime Fix Water Leak Detection Engineer

On call around the clock for leak detection, plumbing, heating, electrical, and drainage emergencies.

One number, every trade

On call around the clock for emergencies. For planned work and quotes, we typically respond within the hour during business hours.

24/7 Phone Line

0208 108 0400

Email Us

info@primefixgroup.uk

Hours

Monday to Friday 8am to 6pm | Emergency Line 24/7

Request a Callback

Leave your details and a PrimeFix engineer will be in touch within 60 minutes.

Water Leak Detection FAQs

Common questions about water leak detection, answered plainly. If you don't see what you're looking for, call us on 02081080400 and we'll talk you through it.

How much does leak detection cost?

Our leak detection call-outs are charged hourly — £120 +VAT covers the first hour, then £60 +VAT for each half-hour after that. There’s no call-out fee, and you’ll get a confirmed price before anyone picks up a tool. Parking, ULEZ, congestion charge and fuel surcharges are never added on top.

Most surveys wrap up in one to two hours, though it depends on the property size and how the pipework’s laid out. We’ll give you a realistic estimate at the time of booking, not after we’ve arrived.

 

Almost never. Thermal imaging, acoustic tracing, moisture mapping and tracer gas let us narrow down the source before any opening-up work is even considered. Most jobs are resolved without touching a single tile or panel.

 

Always. Every survey ends with a full digital report covering the leak source, the methods we used to find it, and our findings — written to a standard accepted by every major UK insurer handling trace and access claims.

 

Both. We run a 24/7 emergency line, 365 days a year, with no out-of-hours surcharge. If it’s not urgent, we’re just as happy to book a slot that suits your schedule.

 

Yes — every engineer holds relevant qualifications (NVQ Level 2/3, Gas Safe registration, NICEIC approval where the job calls for it), and PrimeFix itself is CHAS accredited and SafeContractor approved.