I have a Watts 374A Water Pressure Relief Valve that is dripping a little
less than an ounce a day. I already replace the expansion tank. (The PRV was
spitting out quite a bit more before that.)
Somewhere at the Watts Web site, I read that some dripping is OK - and means
"that the valve is working." I could live with the water loss, if it was
just water. But glycol is too expensive to just pour down the drain.
Can a PRV be serviced, cleaned, etc., or must they always be replaced?
My Watts valve has a set point of 30 PSI. I've observed that my hot water
baseboard system is operating between 12 and 18 PSI. I've NEVER seen it
above 18 PSI, so it seems like a 30 PSI valve shouldn't be releasing ANY
water. What is normal?
Thanks for any insight.
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