Dye test (drain tracing)
Tracing test using coloured dye to confirm which drain a fitting connects to.
We provide fast, reliable drainage and plumbing services 24/7.
Tracing test using coloured dye to confirm which drain a fitting connects to.
Industry standard scheme that grades drain defects from 1 (minor) to 5 (severe).
Electronic sonde inserted into a drain that emits a signal detected at ground surface.
WRc grade reflecting how a defect affects ongoing service and operation of a drain.
Hand-held receiver used to detect signals from sondes and trace underground drain runs.
Test forcing harmless smoke into drains to reveal hidden leaks, misconnections and vents.
Hydraulic test that pressurises a drain section to confirm watertightness against a standard.
Test using applied vacuum to check watertightness of manholes and inspection chambers.
Pressure test using compressed air to check the integrity of new drainage installations.
Pressure test using a controlled head of water to check drain watertightness.
Greater London Drainage is a family-run company providing professional drainage and plumbing services across Greater London.
