Watts 0121558 Valve 321702-401 refer to the internal switch

refer to the internal switch block markings to ensure compatibility with your condenser fan motor

As a field-ready solution for residential and mobile home air handlers

the internal bimetal disc may be fatigued or damaged

Built for rugged performance

Watts 0121558 Valve 321702-401 refer to the internal switchThe Watts 0121558 (Series LF174A) is a high capacity 2 inch boiler pressure relief valve designed specifically for large scale commercial hot water heating and domestic supply systems. Engineered with a lead free copper silicon alloy body, this valve is rated for a 75 PSI set point and provides an exceptional discharge capacity of 7,770,000 BTU hr. Its construction features NPT female threaded connections for both the inlet and outlet, ensuring a