Banging Pipes and Water Hammer
A sharp bang or shudder through the pipes when a tap or appliance shuts off..
A sharp bang or shudder through the pipes when a tap or appliance shuts off.
What is actually going on
A sharp bang or shudder through the pipes when a tap or appliance shuts off.
The realistic causes, in order
Fast-closing solenoid valves in washing machines and dishwashers stopping the flow abruptly Unclipped pipe runs under floors that are free to move and strike joists High incoming mains pressure with no arrestor or pressure reduction fitted
What we test on site
Incoming mains pressure and flow rate at the stop tap Pipe clipping and support along accessible runs Whether a shock arrestor is fitted where appliances tee off
What you can safely look at with water hammer in the pipework
- Note exactly which appliance or tap triggers the bang
- Check if it only happens at certain times of day, which points at street pressure
- Persistent water hammer stresses joints and can eventually cause a leak inside a floor or wall — worth fixing before it becomes a leak repair.
Who does the work
- Gas Safe registered engineers — registration 554328
- Worcester Bosch accredited installer
- John The Plumb Ltd, company registration 10026483
Get water hammer in the pipework diagnosed properly
Re-clipping, an arrestor or a pressure reducing valve solves it, chosen to suit your actual mains pressure.
Questions we get asked
Where does water hammer in the pipework usually start in the pipework?
Fast-closing solenoid valves in washing machines and dishwashers stopping the flow abruptly
What normally puts water hammer in the pipework right?
Re-clipping, an arrestor or a pressure reducing valve solves it, chosen to suit your actual mains pressure.
Is it safe to keep using the system with water hammer in the pipework?
Persistent water hammer stresses joints and can eventually cause a leak inside a floor or wall — worth fixing before it becomes a leak repair.