Since having our gas hot water heater replaced, I've noticed that there's a
single "bang" after hot water use. It isn't associated with turning the
water on and off. I think it is thermal, pipe expansion or contraction after
the hot water heater runs to recover.

Is this going to damage anything? In other words, is it worth figuring out
exactly what is banging and where and trying to fix it?

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Regards,

Jerry Schwartz
http://www.writebynight.com
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