|Posted by Eric on December 01, 2003 at 08:40:30:|
I got home from a long weekend to find my water heater "knocking". I believe I can feel water surging through the cold water pipe into the gas waterheater, and when I put my ear to the waterheater I can hear perhaps a pumping sound? It is quiter downstairs, but louder upstairs in the bedroom where it sounds like a knock. Maybe the cold air returns are amplifying the sound? Help.
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