I just found this group. Most likely an old subject, but with a twist. Are
gas water heater is starting to make a strange noise. It is not the common
popping sound. It is like a 1/2 second drum roll about every 10 seconds, you
would almost think there was a animal in the wall scratching itself in the
wall. The tank is 7 years old GE 50 gal. It also has a 12 year warranty on
it, I can just imagine how far I would get with that. Any suggestion? I
haven't tried draining it yet. Thanks.
Dave, this is caused by mineral deposits on the bottom of the tank. The
deposits insulate the steel, the steel gets hot enough to cause that rumbly
I've made out real well with Reem warranties, but I'm not sure if deposit
conditions are covered, can't speak for GE WH warranties.
Good luck with it.
Found the noise , It was not that mineral deposit sound witch I am familiar
with. The insurance Co ( home warranty) sent out a plumber. He spent about
an hour trying things and determined it was excessive water pressure, but he
left had no gauge to check it. But being in the pipe trades as soon as he
left I set up a gauge I check the Pressure Regulating valve on water
supply. 60 PSI with water running, slowly went to 83 PSI with thermal
expansion. Tank has a Max working of 150 PSI Noise was still there at 60
PSI, So I ruled out excessive pressure. Plumber said that the Dielectric
nipples going into the tank had check valves. I had a set of dielectric
nipples without check valve. So that solved the problem not a noise to be
heard. There is a small marble in the check valve. I am also going to pipe
an expansion tank on the hot side 83 PSI I think is a little high even
though I've had no other problems. In my home warranty deposits condition
are covered, Someone would get a check for writing that in a warranty.
Why not just install a pressure reducing valve on the main to the
whole house like required by code in many areas? Wouldn't that be
easier that installing an expansion tank? expansion tanks aren't
designed to reduce pressure. A PRV is designed to reduce pressure.
On Fri, 24 Jun 2005 14:27:07 GMT, "Sacramento Dave"
the expansion tank is to help with thermal expansion not to control
pressure.The PRV will control the pressure of the water when it is running,
on the house side the pressure will slowly rise because of thermal expansion
caused by the hot water expanding. As we all known water dose not compress
but will expand with heat so it dose not take much to raise the pressure.
Most hot water system I have piped in commercial system have an expansion
tank. Some have a PRV that will blow of excessive pressure but then you
have to pipe a drain line off of that, Not practical in a home.
You placement of the thermal expansion tank on the hot supply is incorrect.
It belongs on the cold inlet to your water heater, with a check valve behind
How does pressure make a check valve rattle????
Do you have a hot water recirc line?
All water systems have expansion tanks.
Well yeah...water doesn't compress. But since you have an expansion
tank on the cold side already, if you're talking pressure, you need a
pressure reducing valve.
You were talking about installing an expansion tank on the hot side of
the system IN ADDITION to the expansion tank on the cold side. You
don't need two expansion tanks.
On Fri, 24 Jun 2005 17:30:20 GMT, "Sacramento Dave"
dave i am waiting for you to say something that makes just a little bit of
but more importantly; the tank does not go there for reasons that will
effect your domestic water supply adversely.
another asshole lib who thinks he is soo much smarter than us plumbers, and
we could not possibly understand his problem cause its "special". I belive
you are in the pipe trades. I belive you trade bongs too. CA sucks.
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