Moving water carries momentum. Snap a valve shut — as washing machine solenoids and quarter-turn taps do — and that momentum converts into a pressure spike that hammers through the pipework, rattling loose pipes against the frame.
Beyond the noise, repeated hammer fatigues joints and fittings. Fixes range from securing loose pipes and slowing valve closure to installing hammer arrestors near the offending appliance.
Describes the pressure-shock phenomenon in supply pipework.
Water supply pipes near washing machines, dishwashers and fast-closing taps.
A CCTV drain inspection is the standard way to confirm whether this is what's happening in your pipes: the camera shows the condition on screen, a locator pinpoints the exact position and depth, and you get a recorded report before any repair decisions are made.
A CCTV drain inspection shows exactly what's happening inside your pipes — no guesswork.