Hissing sound in copper pipe
Posted by Russ on July 31, 19100 at 13:59:37:
I have a cold water leak somewhere in (or underneath)my slab. There is no evidence, inside or outside, of water; but the hissing is unmistakably a leak. It is slowly getting worse. Is there any way to pinpoint the origin through sound? Toilets have been eliminated as the source. The missing is loudest at the two bathroom sinks. At some cold water pipes, such as the kitchen and laundry room, it can not be heard at all. I have used a stethescope to amplify the sound. The house is 40 years old with copper piping.

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