Posted by Danielle on December 12, 2003 at 17:17:54:
In Reply to: Re: constant water pipe knocking behind wall posted by Hube on September 29, 2003 at 15:16:00:
I am having the same problem - were you able to find out what was wrong and what did you do to fix it?
: : This only happens with the upstairs plumbing.
: : When the upstairs shower is turned on (either bath) on the first floor behind the wall where the water pipes lead to the upstairs there is a constant knocking. Fairly loud. This starts out rapidly at first and the settles in to about one knock about every 30 seconds until the upstairs shower is turned off and it will last a while longer after that but slowly diminishes.
: : Water pressure is at 70 and the knocking seems to coming only from that section behind the wall. You put your ear against the wall and you'd think someone is hitting the pipes with a sledge. I'm getting ready to remove the sheetrock to look behind the wall. Thought I'd check here before doing so. Any ideas?
: John; It can be caused by a number of things, but it could be loose section of pipe that needs another hanger or clamp to to the stud, , good luck, Hube