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Tobinator 01-15-2011 11:06 PM

Leaking Relief Valve
I finally got around to bleeding my radiators today. Two had a little bit of air (30-60 seconds to bleed). 6 hours later, I was in the basement and heard the relief valve blow.

Last year, draining half the expansion tank cleared a slow drip from the relief valve. But today, it didn't stop the slow steady stream coming out of the relief valve. So I shut off boiler, the feeder valve, boiler in and out valves and still got water coming out. I assume the only place it could come from is the expansion tank. I opened up the relief valve and it finally drained out the remaining few gallons.

I plan on checking to make sure the expansion tank is empty in the morning and then turning on the system. Is there a particular order to opening the valves? Would you bother seeing if the valve is still leaking first or just replace it?


beenthere 01-16-2011 07:37 AM

An expansion tank should never be just half drained.

Post pics of your set up. Otherwise, no real way to tell you what order to do anything with your system.

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