This 3/4 IN lead-free boiler pressure relief valve is used in hot water heating and domestic supply boiler applications to protect against excessive pressures on all types of hot water heating supply boiler equipment. It consists of a lead-free body construction with NPT threaded female inlet and NPT threaded female outlet (drain) connections, non-metallic disc to metal seating, stainless steel spring and test lever. It resists corrosive water conditions, sticking and freezing and prevents water and sediment from being trapped in the seat. It is designed for emergency safety relief, not as an operating control. The pressure setting is 75 PSI (517 kPa), with corresponding ratings of 1320000 BTU/hr.

Watts LF174A Boiler Pressure Relief Valve, Copper Silicon Alloy Body, FNPT X FNPT Connection, 4-1/2 IN Height, Industry Standards: ASME, BAA Compliant, NSF Certified, Lead Free: Yes, 3/4 X 3/4 IN Nominal, 75 PSI, 1.2 LB Weight, 2-3/4 IN Width

• Spring loaded
• Soft seated
• Automatic reseating

• Specification Name https://macombstage.cimm2.com//ASSETS/DOCUMENTS/ITEMS/EN/WATTSLF174A7534_Spec.pdf