Re: Water Heaters that go "bump, bump, bump in the night"
Posted by Larry Stephens on June 11, 2002 at 02:02:05:
In response to Re: Water Heaters that go "bump, bump, bump in the night"
I have this same problem. My water heater is relatively new and is a Rheem. I have identified the source of the noise as the baffle in the vent tube. This baffle hangs down from the top of the water heater. The noise is a metallic clang which occurs shortly after the flame lights and happens once per cycle. It happens no other time. My heater is a very small amount out of plumb in one direction. I plan on draining it and putting a metal shim under one of the feet. Thank you for bring this idea to my attention.

Remember: the noise must be a metallic in nature for this to be a possibility.

Larry Stevens June 10, 2002
: Posted by Bill Bourgeois on April 16, 2002 at 09:10:41:

: In Reply to: Re: Gas Water Heater with a knocking noise posted by Terry Love on April 07, 2002 at 15:36:38:

: Terry:
: Thanks for the reply, I will certainly check the heater for the possibility that you mention. My daughter called a local plumbing company and they said that sediment could also be a cause of the noises. The heater is only about 5 years old. Can sediment build-up occur in such a short time and can it cause the noise? If so, how to remedy the condition. Will a simple draining of the heater remove the sediment? What about mineral deposits?

: Thanks
: Bill Bourgeois

: : Bill,
: : I have encountered gas water heaters that knock. You may check to see if it's the baffle that fits into the interior verticle tube that acts as a chimmny. If the tanks "leans", and thereby the baffle knocks against the sides, you can shim the tank upright, and hopefully prevent that.
: : Then again, that may not even be the problem. But it's one thing you can check. Terry

: :
: : : Yes they can make noises and the problem is not repairable except by replacing the water heater. hj

: : : : 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?

: : : : Thanks
: : : : Bill Bourgeois




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