I am having an issue with my drain pipes. When I run hot water, either through my kitchen sink, bathroom sink, dishwasher, etc., there is a knocking sound that comes from the drain pipe. IT IS NOT THE SUPPLY LINE MAKING THE NOISE. Just want to be clear about that part. It will start off as a rapid knocking sound that will gradually slow down to a stop in about a 2 minute time frame. But after a while of constant hot water running, it will go away. However, the moment I switch to cold water, the knocking sound will come back in the drain line. It sounds like it is coming from behind the wall. I do not have ABS pipe for my drain. I believe they are steel.
Is there anyone else that has had this problem and knows how to fix it?
Is there anyone else that has had this problem and knows how to fix it?
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