Gas Water Heaters
Posted by on April 06, 2002 at 10:30:46:
My daughter has a gas water heater in her attic. Occasionally she hears a "knocking" noise coming from the attic space and upon investigation is unable to locate the source. Is it true that water heaters can make this noise and if so, what causes the noise and how to fix it?

Bill Bourgeois

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