Leak detection in Dartford.

Thames Water's chalk-aquifer supply delivers hard water – consistently 270 to 320 ppm CaCO3 across DA1 to DA4 – that deposits scale on pipe walls and on the internal surfaces of fittings. Scale build-up raises operating pressure and eventually causes pinhole failures, particularly at elbow joints and in the lead or early-copper supply pipework still present in a proportion of Dartford's pre-1960 terraces. In Greenhithe's converted waterfront blocks, concealed pipe runs behind dry-lining make audible detection almost impossible without instrumentation.

We apply three complementary methods. Acoustic correlation identifies the precise leak location along pressurised supply lines by comparing signal travel times between sensor pairs, narrowing excavation to a minimum. Thermal imaging reveals moisture migration through floor screeds and wall cavities where water has been tracking for weeks. Tracer gas – a non-toxic hydrogen-nitrogen mix – is used for the most deeply concealed runs, rising through the soil to the exact break point. Every survey concludes with a written insurance-grade report: methodology, findings, photographic evidence and a dimensioned location sketch, formatted for direct submission to your loss adjuster or buildings insurer. No callout fee applies; see /pricing for fixed-rate survey costs.