回复：回复：如果几乎肯定有问题，可以从下面割开一点看

来源: 于 2012-11-08 07:27:34 [旧帖] [给我悄悄话] 本文已被阅读：次

most likely, it is not the leaking, but the sound from water and pipe.

PVC pipe have this problem, i have a townhouse before, we think the same way, after getting someone, they are sure it is the sound from the pipe(PVC).