Might be your faucet. Sometimes they set up a loud vibration. May happen
only after the hot water hits the faucet. If it is a washer type faucet,
take it apart.

Water hammer only occurs when you shut off the water too abruptly.

--
Walter
www.rationality.net
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"Adam Preble" wrote in message
...
I'm trying to get more information about what I might be seeing here. I
have a home warranty that will probably get it repaired, but I wanted to
make sure they sent the right guy out (plumber or water heater repairman).

When I'm running hot water in the kitchen, I'm getting a Continual
pounding sound from the water heater. I think it's like water hammer, but
it's at a rate like a woodpecker attacking a tree in a cartoon.

It's happened when running the sink on hot or the dishwasher. Any ideas?