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How do you replace a pressure relief valve?



  • bender1227
    bender1227 Member Posts: 50
    I have a Weil McLain Gold GCT boiler with an expansion tank and a separate hot water heater.

    My pressure relief valve isn't releasing pressure when the gauge reads 40 psi so I am going to replace it.

    The current valve is a watts m330-m1
    30 SPI
    375,000 btu

    How do I replace this?
    Are there any precautions I should be doing or extra servicing that needs to be done after this installation?
  • ChrisJ
    ChrisJ Member Posts: 15,677
    I almost never say this, but please, please, hire someone.

    If you tell us your area I'm sure we can recommend someone good that will treat you fair.
    Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment
    KC_JonesTinmanJUGHNEdelta T