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> 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.
>
>

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> 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

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> bubbly noise.
>
> 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.
>

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>
>"CES" <spamspamspam@internet.net> wrote in message
>news:bVnue.2132$S_6.2029@trndny09...
>rumbly
>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.
>

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> 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.
>
>
>There is a pressure reducing valve on the main were it is suppose to be.

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>
> "Blackbeard" <michael_curtis_young@lycos.com> wrote in message
> news:dteob1huft79rv8dnv93kge2h1dkvngiqj@4ax.com...
> 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.
>
>

quote:

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>
>"Blackbeard" <michael_curtis_young@lycos.com> wrote in message
>news:dteob1huft79rv8dnv93kge2h1dkvngiqj@4ax.com...
>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.
>

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>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.

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> 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"
> <diacono@sbcglobal.net> wrote:
>
>