Field Reliability: Precision-engineered pilot operation allows for stable opening and closing even at maximum operating pressure differentials

This delay prevents short-cycling by ensuring the motor windings have sufficiently cooled below the trip threshold before allowing a restart

Broad Compatibility: Replaces multiple part numbers including SWT02521

Designed to meet SAE J513 standards

Its rugged construction and high-performance filtration make it an essential HVAC replacement part for ensuring long-term equipment reliability in the field

Watts 0121513 Valve Freon Field Reliability: Precision-engineered pilot operationThe Watts 0121513 is a high capacity LF174A 1 1 4 50 boiler pressure relief valve specifically engineered for hot water heating systems and domestic supply boilers. Built with a lead free copper silicon alloy body, this valve is designed to protect against excessive pressure by providing a high volume emergency discharge reaching 2,459,000 BTU hr. It features 1 1 4 inch NPT threaded female inlet and outlet connections, housing a stainless steel spring