I just drained the hot water heater, as I do every year (using the following video for instructions: https://youtu.be/qqaehhGYV_I). This time, the pressure relief valve had a slight hiss after I refilled the tank and closed the valve.

I noticed today the discharge valve on the side of the house is spewing hot water continously from the hot water heater.

Do I need to replace the pressure relief valve, or what is the issue?


1 Answer 1


Sometimes when you open older valves, they get stuck open. If you can't get the valve to reset, you'll have to replace it.

  • Yes, try opening and closing the valve to see if it will re-seal itself.
    – ArchonOSX
    Apr 12, 2016 at 9:50
  • @ArchonOSX Tried and it didn't work. Going to have to replace. Apr 13, 2016 at 14:31
  • Bummer, yeah it is probably scaled up with lime over the years.
    – ArchonOSX
    Apr 14, 2016 at 0:22
  • 3
    Valve replaced and no more leaks. Lots of buildup inside the old valve. Apr 16, 2016 at 19:12

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