Leak Detection in Reigate and Banstead

Leak detection across Reigate and Banstead covers RH1, RH2, RH3 and SM7, taking in Reigate, Redhill, Horley and Banstead in Surrey. SES Water supplies a very hard 330 ppm CaCO3 mains across the district, and the drive from the NW10 dispatch hub runs at 70 minutes. The district sits outside the M25 south, so the longer dispatch window means quote-on-call work is more common than reactive emergency callout for leak-detection bookings.

Quote-on-call leak detection means survey bookings are scheduled with clear arrival windows and a written scope before the engineer is dispatched. The survey begins 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 and inside boxed-in cylinder housings.

Pressure-decay testing across isolated sections of the central-heating primary circuit and the cold mains narrows the failure to a single run before lifting anything. The Sewerin Aquaphon A150 acoustic kit (rod microphone on accessible valves, ground microphone on screed) covers underfloor and concrete-slab leaks across the Reigate town and Banstead stock. Hydrophone work on hot-water cylinders and loft cold-water tanks confirms whether the source is a vessel or a pipework leak. Sodium fluorescein and Rhodamine WT dye under a Spectroline OPX-365 UV lamp separates above-floor plumbing from waste-pipe failures on shower trays.

For underground supply leaks across Horley and Redhill, where buried mains can run thirty metres or more from kerb to meter, the 5% hydrogen / 95% nitrogen tracer gas mix (BS EN 14338 compliant) is the standard tool. 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. The FLIR E76 (320x240 sensor) handles routine tracing on smaller surveys. 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.