heavy hammering noise in pipes

[peter bhatti]

We just install new combi boiler.Since than there is high hammering noise whenever open the and close the water taps.Even the noise is also at night when no one using system.
Any one can suggest how to resolve this problems.

 

[Puddle]

Has someone left the boiler filling loop open on the boiler and system pressure to high,could be the pressure release valve letting excess pressure out,causing hammering at night or when tap turned off causing pressure increase jolt

imho

 

[Paulplumb]

I see what you're saying about the filling loop. You might have nailed it. You may need to fit a pressure reducing valve. Have you checked the incoming water main pressure? You could always try a water hammer arrestor. You could have loose pipes that need clipping. The thing I was struggling with is why is it happening at night. It could be regular water hammer and a toilet has a fault with a push button drop valve letting by into the pan and the inlet valve comes on and off periodically.

Just clutching at straws. Good luck matey.

 

[Puddle]

It happens at night as low demand on mains,so pressure increases,thus system pressure will increase if loop open,opening p.r. valve possibly

imho