Recent content by JB_12

Update (March 25th): Guess what ?! It was the upstairs bathroom shower cartridge that was bad, got it replaced and the noise disappeared as if it was never there. Well, I certainly learnt a lot about plumbing through this process.Thank you all for your suggestions and help.

- Got the PRV changed (Pressure regulating valve not relief) because the pressure was dipping too much when two taps were open. Now the pressure is properly regulated. - Sorry wasn't clear on the different pressures ... The transient pressure was 78-80 psi (if you think of a PID loop , it's...

Yes , there is a PRV at the water shutoff valve to the home.

Thank you all. Am getting the PRV checked for now and will set the pressure to 60 psi for now, will look into arrestors too if the PRV is not the issue.

Hi all, I need some expert advice in diagnosing the problem I have been having for a while. Whenever I open a tap (hot mostly, cold sometimes) or close a tap , or when the toilet stops flushing, or when the washer starts fill or stops fill I hear a knocking noise from behind the wall (upstairs...