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Help - water leaking from pressure release valve
Noticed some water leaking from pressure release valve whenever boiler is activated. PSI on boiler is showing 50.
Turned off boiler, isolated expansion tank and replaced. Noticed immediate drop in PSI down to 25. All good. However 2 hours later PSI on boiler is showing 40, with boiler still turned off.
Does this mean my water intake valve is faulty? It’s a Caleffi 553 auto fill valve. Can I just replace the cartridge?
Any thought greatly appreciated. I have since turned off the water feeding the intake valve. Thanks!!
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