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Water mains leak detection

A supply pipe can lose water for months before anything appears at the surface. We locate the escape without excavating the full run.

Call 0333 567 2635

Seven days a week, 7am to 9pm

What usually brings us out

  • A water bill that jumped with nothing in the house changing
  • The meter still creeping round after every tap is off
  • A patch of drive or lawn that stays wet in dry weather
  • Pressure at the kitchen tap dropping away

How we go about it

  1. 1Isolate at the meter and the stop tap to prove the loss is on your side
  2. 2Listen along the pipe run with ground microphones
  3. 3Correlate between two sensors to fix the distance to the leak
  4. 4Confirm with tracer gas before anyone lifts a slab

Water mains and underground supply in one visit

Mains and internal supply pipes are covered by our no find, no fee terms, and are among the jobs most often repaired during the visit.

Call 0333 567 2635

Jobs like this one

  • A corroded joint on the copper cold feed pipe, exposed in the concrete beneath the bathroom floorOxford · Gabor Weber

    Damp in a corridor, and three circuits to rule out

    Damp on a corridor floor with nothing visible above it. Pressure testing each circuit separately put the fault on the cold feed, and acoustic listening put it under the bathroom tiles.

    Cold feed pipe leak found and repaired beneath bathroom floor.

  • Water spraying from the burst copper supply pipe once the garage floor had been opened upLiverpool · Matthew Barron

    A supplier leak notice and a failed stopcock

    A leak notice from the supplier, wet walls in the garage, and an internal stopcock that would not shut the water off. Tracer gas and acoustic listening agreed on the same corner.

    Underground mains leak found in garage, pipe repaired.

Reviews of the engineers who do this work

TrustScore 4.7 from 1,629 reviews

Read every review on Trustpilot

Read 7 October 2026

  • Excellent Leak Detection and Repair

    We had a major water leak of approximately 220 litres per hour and, with a holiday booked only a few days later, we urgently needed someone to find and repair it. […] Frank arrived at our house. He was extremely polite, professional and clearly very experienced. He quickly set up the equipment, carried out a tracer gas test and pinpointed the leak to an area just outside our garage underneath the driveway. […] The whole job, from arriving at our house to finding and repairing a 220 litre-per-hour leak, was completed in around three hours.

    Shortened. The marks show where text was left out.

    Peter JorgensenRead it on Trustpilot

  • Fast, effective leak diagnosis and repair

    Fundamentally, the engineer (Mark Pavitt) identified the source of the leak, repaired it and had our house back up and running within the same day. As part of achieving this, he kept the damage to a minimum (only having to cut out sections of the kitchen plasterboard ceiling). He cleaned up the debris, was polite, cheerful and informative of root cause and actions throughout the day. I think the key to success is having an engineer that has expertise in both leak detection and plumbing.

    R. CreganRead it on Trustpilot

  • Very professional and swift service

    Very professional and swift service. Frank arrived and had detected and repaired the leak within 3 hours. Would highly recommend

    Carolyn H.Read it on Trustpilot

Other leaks we find

Speak to the team that books the engineers.

One call confirms the earliest available date and the price, before you commit to anything.

  • You describe what you have seen
  • We find the nearest available engineer
  • You get a date and a price before booking
0333 567 2635Call now

Seven days a week, 7am to 9pm. Most home insurance covers the cost of finding a hidden leak.