WHEN THE BATHROOM WATER IS RUNNING THERE IS A KNOCKING SOUND. IF THE TOILET IS FLUSHED AT THE SAME TIME THE CADENCE IS FASTER. IT DOES STOP UNTIL THE WATER IS TURNED OFF.SOME ONE AT WORK SAID IT WAS DUE TO POLY PIPES BEING REPAIRED INCORRECTLY. PLEASE HELP null
Its kind of hard what to tell you but some of the problems like you say come from , if the pipes are run through studs are joist and the holes are too smallthe pipe expans and moves and rubs on the holes to make a noise. Also you could have a loose washer in a valve that controls the water and also on a PRV valve. Do you have city water are well. Let me know. Try to pinpoint the noise buy turnning on 1 fixture and see if the noise comes from one fix. are does it on all.