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When troubleshooting a pressure switch stuck open error code
Can I use a potential relay for startup
you should see continuity (0 ohms) across the terminals
which mitigate the common failure points of standard valves—such as plunger mushrooming
Watts 0121575 Valve 30067439-890 When troubleshooting a pressure switchThe Watts 0121575 is a high capacity ASME Section IV water pressure relief valve engineered for commercial hot water heating and domestic supply boiler systems. Built with a lead free copper silicon alloy body, the Watts LF174A 2 inch valve is designed to manage thermal expansion and provide overpressure protection in demanding mechanical rooms. This model features a 150 PSI pressure setting and is capable of a massive steam discharge capacity of
