Flushed toilet causing knocking noise in wall
Posted by RJ on February 15, 19101 at 12:10:13:
I live in a 3 story townhouse and when one of the two top floor toilets is flushed a loud knocking noise starts up in the wall (or maybe ceiling?) between the toilet and the master bedroom. The sound eventually stops as the toilet refills. It only happens in one of the bathrooms if that helps diagnose the problem. Any thoughts on a fix for this annoying problem?

Thanks in advance!

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