plastic drainpipe
Posted by Mike Allen on January 01, 2003 at 18:36:47:
Both of my bathtubs are upstairs and have plastic drainpipe. When the tubs are draining after someone has taken a bath,you can hear a pecking sound in the wall downstairs for about a minute or two and then the sound stops.You only hear the sound when the pipes are draining. What could it be ?

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