How do you detect a hidden water leak?

We use a combination of acoustic listening devices, thermal imaging cameras and tracer gas testing to pinpoint leaks without unnecessary digging. This non-destructive approach means we find the leak precisely before any access is made.

Is leak detection covered by home insurance?

Many home insurance policies include trace and access cover, which pays for the cost of finding and accessing a hidden leak. We provide full insurance-approved reports to support your claim.

How long does leak detection take?

Most leak detection surveys take between 2–4 hours. In many cases we can locate the leak and carry out the repair in a single visit.

Who is responsible for a water main leak?

The section of water supply pipe from the boundary of your property to your house is your responsibility as a homeowner — not the water company's. If you suspect a leak, contact us for a free assessment.

Do you cover East Grinstead and surrounding areas?

Yes — we cover East Grinstead, Crawley, Haywards Heath, Horley, Burgess Hill, Lingfield, Forest Row, Oxted and across Sussex and Surrey.

Leak Detection in East Grinstead & Across Sussex

Pinpoint hidden leaks fast — without ripping up floors or driveways. Sussex & Surrey.

Find the leak. Fix only what's needed.

Hidden leaks waste water, raise bills and cause serious damage if left unchecked. We use specialist equipment to locate leaks accurately — whether they're under a tiled floor, behind a stud wall or buried under a driveway — so the repair is targeted and minimal.

What we use

Acoustic leak detection
Thermal imaging surveys
Pressure testing
Tracer gas detection
Hidden underfloor & in-wall leaks
Underground supply pipe leaks

Underground water main leak detected and exposed — active water leak on blue MDPE pipe in Sussex — A live underground water main leak located using acoustic detection. Water was actively pouring — left longer, this would have caused significant property damage and a large water bill.

Finished water leak repair — front garden hedge and landscaping left completely undisturbed by Grange Plumbing — The same property after repair. The hedge, garden and path were left exactly as found. Non-destructive detection means we find the leak precisely before making any access.

Signs of a hidden water leak

If you've noticed any of these around your home, it's worth booking a leak detection survey before damage gets worse.

Unexplained rise in water bill
Low or dropping water pressure
Damp patches on floors, walls or ceilings
Boiler losing pressure repeatedly
Soggy or unusually green patch in garden
Sound of running water when all taps are off

Trace & Access for insurance claims

Many home insurance policies include trace and access cover — which pays for the cost of locating and accessing a hidden leak. We provide full insurance-approved reports and documentation to support your claim. If you're unsure whether your policy covers this, we can advise. Contact us on 07894 956041 for a free assessment.

Leak detection in Mid Sussex

We carry out leak detection surveys across Mid Sussex every week. For dedicated info on your area, see:

Leak Detection in Haywards Heath

Including Lindfield, Cuckfield & surrounds.

Leak Detection in Burgess Hill

Including Hassocks, Ditchling & surrounds.

Leak Detection in East Grinstead

Including Forest Row, Lingfield & surrounds.

Related services

Moling — trenchless pipe replacement →General Plumbing →

Helpful articles

How to spot a water leak →

Frequently asked questions

If our leak detection confirms your water main needs replacing, we can often carry out the replacement on the same day using our trenchless moling service. Find out more about water main replacement.

★★★★★ Perfect 5-star rating across all platforms

“Howard quickly and efficiently located and repaired a leak on our water main. Brilliant service — would highly recommend.”

Howard, Sussex

“Professional, friendly and informative throughout. The price quoted was exactly what we paid — no surprises. Left everything clean and tidy. Will use again.”

Local customer, East Grinstead

“Solved a problem that three other plumbers had failed to fix. Couldn't recommend highly enough.”

Local customer, Sussex

See all our reviews on Google

Areas We Cover

Grange Plumbing provides leak detection across Sussex & Surrey

East Grinstead
Crawley
Haywards Heath
Horley
Burgess Hill
Lingfield
Forest Row
Copthorne
Turners Hill
Felbridge
Oxted
Redhill
Reigate
Cuckfield
Lindfield

We also cover all surrounding areas of West Sussex and Surrey. Not sure if we cover your area? Call us on 07894 956041.

Free callback

Get a Free Assessment

Leave your details and we'll call you back — usually within a few hours.

Suspect a leak?

Get in touch — we'll locate the problem and fix it with minimal fuss.