vibrating cold water supply pipe pressure reducing valve

[sounddezign]

I have a range tribune unvented hot water cylinder with the "high flow rate inlet control set" (pressure reducing valve with non return valve and pressure relief valve)

Its been working fine for years but I now have water hammer while the tap is running which continues after the tap is turned off. Its the cold supply pipe running into the flat that vibrates throughout the whole block. It stops as soon as I turn off the stopcock before the pressure reducing valve. The vibration will start again as soon as I turn on the stopcock again unless I manually release the pressure on the pressure relief valve before hand.

Has anyone seen (or heard) this before?

Could it be a knackered pressure reducing valve? Or another component in the system?

 

[Gray0689]

I've seen that before on range cylinders and it was expansion vessel that was at fault

 

[vern]

I have a range tribune unvented hot water cylinder with the "high flow rate inlet control set" (pressure reducing valve with non return valve and pressure relief valve)

Its been working fine for years but I now have water hammer while the tap is running which continues after the tap is turned off. Its the cold supply pipe running into the flat that vibrates throughout the whole block. It stops as soon as I turn off the stopcock before the pressure reducing valve. The vibration will start again as soon as I turn on the stopcock again unless I manually release the pressure on the pressure relief valve before hand.

Has anyone seen (or heard) this before?

Could it be a knackered pressure reducing valve? Or another component in the system?

Get a G3 engineer to check vessel as said......

 

[JON]

Iv just put up with water hammer in my own house for 3 months, thought it was the 1/4 turn taps but it was still banging when the taps were off. I found the cause last week it turn out the spindle from the stopcock had snapped inside.

 

[lbp plg & htg]

Vessel will be the cause or non-return valve.