Re: Watts Water Pressure Reducer
Posted by Deb on July 26, 2003 at 15:58:34:
In response to Re: Watts Water Pressure Reducer
: The pressure on the incoming line is 105 psi and the Pressure Reduceing Valve is preset to reduce the water pressure down to 50 psi. I think it would be safer to just go ahead and put a water expansion tank on the cold water line in addition to the PRV. Waht do you think?

If there is no danger of your incoming water pressure being higher than the pressure release setting on your T & P, you should be fine without an expansion tank. I would, however, make sure that my T & P line terminated someplace suitable (like outside).
The Pipewench
: : : It is the Watts 25AUB By Pass Model. The description says, "Allows water to escape back into the supply main line before it can affect the relief valve". Is it still true I don't nned the expansion tank if I get this PRV?
: : : : : I was told that this reducer has a built in expansion valve and I didn't need a water expansion tank. Is this true?

: : : : If this simply has a bypass, then you probably need an expansion tank. I have never seen a PRV with a built in expansion valve (where does the expanded water go?). What brand and model is this?
: : : : Deb
: : : : The Pipewench

: : If the pressure on the main supply is higher than the pressure release setting on the T & P valve, it is going to blow. I plumb in areas where the incoming pressure is 180 psi or greater. The T & P pressure release is 150 psi. As the pressure increases, the increase pressure is going to try to get back into the main water system via the bypass, but it cannot, because the pressure out there is 180. When it hits 150 and it can't bypass back into the system, the T & P will release.
: : Deb
: : The Pipewench

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