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 banging cold pipe
Author: kradeke (IL)

Hello. I purchased a gut-rehab about 9 months ago. Since Jan, I have heard a banging/clicking sound coming from where the plumbing runs in between the basement and first floor (in the ceiling) after I flush the toilets. It is the loudest and most numerous (multiple times) if the toilets haven't been used in a while (overnight, etc). What's weird is that its not the same every time. In fact, after 3 or 4 flushes, the noise can go away. I think I've narrowed it down to one spot but I don't know if the problem is somewhere else and I just hear the banging sound in one spot. Before I open up the ceiling in my basement (it is finished) I am looking for suggestions. Thanks!

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 Re: banging cold pipe
Author: North Carolina Plumber (NC)

Have you checked your incoming water pressure ? It might be too high and need a reducing valve.

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