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 Water Leak Detection Engineer

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.

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 £42.50 per 30 minutes — 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.
Water Leak Detection
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Water Leak Detection

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 £85 +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 M | 9+ Years experience

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

Arron H | 15+ years experience

Gas Safe Registered | NVQ Level 2 | Fully Qualified Plumber

Arber J | 25+ Years Experience

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

Chris V | 12+ Years Experience

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

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 — £85 +VAT covers the first hour, then £42.50 +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.