Leak Detection in Tandridge

Leak detection across Tandridge covers RH7, RH8, RH9, CR3 and CR6, taking in Oxted, Lingfield, Caterham and Warlingham in Surrey. SES Water supplies a very hard 330 ppm mains across the district, and the drive from the NW10 dispatch hub runs at 70 minutes. This is a rural-fringe district where account-client portfolios with rural lets often pair Tandridge with other Surrey areas on a planned PPM schedule.

Rural-let portfolio work brings a particular brief: leak-detection surveys booked as part of a planned PPM round, written reports paired with photographs and thermal images, and a clear hand-off to the repair lead with the source pinpointed precisely. The survey starts with a Protimeter Surveymaster and Tramex pinless moisture map to fix the wet boundary, then the FLIR E96 thermal camera (640x480 sensor, less than 0.04 degrees C differential) follows heating-circuit flow under solid floors.

Pressure-decay testing across isolated sections of the central-heating primary circuit and the cold mains narrows the failure to a single run before opening up. The Sewerin Aquaphon A150 acoustic kit (rod microphone on accessible valves, ground microphone on screed) covers underfloor and concrete-slab leaks across the Oxted and Caterham stock. Hydrophone work on hot-water cylinders and loft cold-water tanks confirms whether the source is a vessel or a pipework leak.

For underground supply leaks across Lingfield and Warlingham, where buried mains on rural lets can run thirty metres or more from kerb to meter and sometimes cross access tracks, the 5% hydrogen / 95% nitrogen tracer gas mix (BS EN 14338 compliant) is the standard tool. Sodium fluorescein and Rhodamine WT under a Spectroline OPX-365 UV lamp separates above-floor plumbing from waste-pipe failures on shower trays. Damp surveys close with a salt-test analysis (30 minutes on-site, 48-hour lab turnaround) for nitrate (rising), chloride (penetrating) or neutral (plumbing) salts. Every investigation generates an insurance-grade trace-and-access report accepted by LV, Aviva, Direct Line, Admiral, Hiscox, Zurich, AXA, RSA, NIG, Allianz, Ageas and Legal & General. Survey from a fixed starting fee, repair work at the M25-adjacent half-hour rate.