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Always verify your boiler's Series number and MBH input before installation to ensure the control board’s ohm-curve matches the sensor output
Dual Terminal Versatility: Equipped with both box lugs and quick-connect terminals to accommodate various wiring field conditions
dustproof steel housing to protect internal components from harsh mechanical room environments
If the motor is getting high voltage but fails to turn
Watts 0275824 Valve 321142-301 Always verify your boiler's SeriesEnsure critical over pressure safety for commercial heating systems with the Watts 0275824 (Series 174A M1), a high capacity 1 1 4 inch NPT pressure relief valve specifically engineered for hot water space heating boilers. This ASME Section IV certified valve is preset to 50 PSI and provides a discharge capacity of 2,459,000 BTU hr, making it a reliable choice for large scale hydronic applications. The bronze body construction is designed to resist