loud vibration from tank every time turn off cold tap ?

the fault is the ball valves fit new or fit washers

arthur
January 2009

I think it is to do with high water pressure and possibly loose pipework. When you turn off a tap (particularly if you turn it off quickly) it creates a pressure wave back up the pipework. You could try turning the main stopcock to the house off and then just back on a quarter to a half turn. This may reduce the pressure enough to at least reduce the symptoms. If you can check out the pipes that are vibrating you may be able to support/secure them at more regular intervals - that will probably help as well.

Richard
January 2009