tapping sound in main supply pipes
Posted by edbreyer on October 11, 2002 at 13:39:16:
When the hot water is turned off at any upstairs faucet, I occasionally hear an intermittent, tapping sound in the hot water heater or the pipes near it. It's not loud or forceful (not like water hammer) - and I can live with it as long as it's not a sign of a pending problem. By the way, all the plumbing and hot water heater are less than a year old. Any ideas?

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