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Posted by Jeff S on November 21, 2007 at 21:57:55:
In Reply to: Re: Laars/Endurance Relief Valve Leak posted by HeatPro on November 21, 2007 at 20:23:44:
Thanks HeatPro. That website was very informative.
1) In the section where you say "Misnamed PRV", you essentially say that we don't need a PRV, or what the plumber call's automatic feed, and it is better off to have the hand valve shut to the closed system. Do you recommend that we shut off the hand-valve on the supply side of the PRV after the service person has adjusted the pressure in the system. (BTW, when I bought this house it was that way, and it has been working that way until a leak happened, and the plumber told me that was wrong!).
2) In my case, the PRV is set at 15PSI, and the expansion tank at 12PSI. So we drained the system just above 15PSI, so that we don't get feed more water fro the system. So the cold water pressure before we started up the furnace was at 15PSI. It never goes below it.But the boiler takes it up to 26PSI some times. I checked the air pressure in the expansion tank with a tire gauge, and it was spot on to the pressure in the system, when it starts up ~15, and then increases as the furnace temperature increases. I guess the expansion tank is doing its job. But I am worried that 26 PSI as you said is too high.?
Thanks for your reply.
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