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Testing a 15psi pressure safety valve on my steam boiler

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handson
handson Posts: 18
in Strictly Steam
How do I test the pressure safety valve on my boiler? The PRV is 15 psi and nothing happens when I pull up the valve lever...unlike my gas water heater!

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  • Joe V_2
    Joe V_2 Member Posts: 234
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    easy

    turn boiler on to build pressure. lift lever and it should release steam/water. dont burn yourself. if nothing is happening, buy a new one and replace it. repeat test.
  • Unknown
    Unknown
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    oh man...

    Another good boiler piped wrong...
  • Hap_Hazzard
    Hap_Hazzard Member Posts: 2,846
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    Yup.

    No header, bullhead tee… Nice stuff.



    Nothing to do with why the PRV isn't working. It's probably piped out the side and the nipple has filled up with sludge.



    If you don't test that valve at least once every season, the nipple will fill up with all the crud that either floats to the top or gets churned up and splashed into it. It's usually not too hard to clean out, but it's enough to keep the vent from working even with 15psi behind it.



    While you have the valve off you might also want to see what pressure it opens under.
    Just another DIYer | King of Prussia, PA
    1983(?) Peerless G-561-W-S | 3" drop header, CG400-1090, VXT-24
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