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pressure relief valve

  1. Boiler Pressure is high

    Our boiler psi has been maxing out at over 30psi. The other day there was water on top of the boiler, but I am unsure where it came from. Others suggested it was the relief valve, but that is on the right side of the boiler and the down pipe drains into a drain. The expansion tank doesn't sound...
  2. Pressure Relief Valve right after the Pressure Regulator

    I'm familiar with pressure relief valves on water heaters but I'm looking at the California Plumbing Code 608.2 ( and it says "An approved expansion tank shall be installed in the cold water distribution piping...