just an issue i have been having with my cold water mains stopcock pipe under the kitchen sink and thought i would get your opinion on it if you knew. for the past few months I have been getting a strange knocking noise (loud enough to be heard in the whole house) which is coming from the mains cold water pipe, basically just after the stopcock handle under the kitchen sink area.
You can even feel the vibration when you hold the pipe. This tends to happen more so when there is no plumbing or appliances in use. As a side issue i do get slight water hammer when the cold tap is turned off suddenly but as I said the knocking/vibrating from pipe happens when nothing is in use randomly
Solutions I have tried have included adjusting the stopcock handle more open and more closed, I have also turned stopcock off and drained the cold water from the cold taps downstairs and turned stopcock back on and also I have had scottish water out to check water pressure at the outside street pipe which is 4bar and fine.
Do i need the stopcock or cold water pipe under kitchen sink looked at by plumber? could it be a faulty stopcock washer?
You can even feel the vibration when you hold the pipe. This tends to happen more so when there is no plumbing or appliances in use. As a side issue i do get slight water hammer when the cold tap is turned off suddenly but as I said the knocking/vibrating from pipe happens when nothing is in use randomly
Solutions I have tried have included adjusting the stopcock handle more open and more closed, I have also turned stopcock off and drained the cold water from the cold taps downstairs and turned stopcock back on and also I have had scottish water out to check water pressure at the outside street pipe which is 4bar and fine.
Do i need the stopcock or cold water pipe under kitchen sink looked at by plumber? could it be a faulty stopcock washer?