Boiler Blowing Pressure Relief Valve - HVAC - DIY Chatroom Home Improvement Forum

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Old 10-18-2010, 08:06 AM   #1
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Boiler blowing pressure relief valve

( this is a branch off of my orginal thread i think i posted in the wrong section, Baseboard Heat / Cold rooms / No Bleeders )

I had accidentally removed all the air from my expansion tank yesterday, then i started blowing the pressure relief valve @ 30 PSI.

In order to fix the problem, I removed the expansion tank from the system, drained all the water out. I then filled the expansion tank to 15 PSI then re-installed the tank onto the system.

Though now I am still blowing the pressure relief valve, Im starting out at about 18 or so PSI, then it gradually keeps building pressure as the system is running till it blows @ 30 PSI.

Any thoughts on what could be wrong?


Last edited by alecmcmahon; 10-18-2010 at 08:38 AM.
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Old 10-18-2010, 05:52 PM   #2
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Turn off the manual valve tot eh auto water feed.


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