34 Lf174A 40Rlfvlv 800000 For Watts Part# 121463

The Watts LF174A 40Rlfvlv 800000 (also known as Part# 121463) is a lead-free boiler pressure relief valve intended to protect HVAC systems. The copper silicon alloy used to make the LF174A valve is free of lead. Both the inlet and the outlet are 3/4-inch NPTF female. 40 psi is the setpoint for pressure relief. When a hot water space heating boiler needs emergency safety relief, the LF174A provides it. Excess pressure is released via the valve, which automatically opens when the system pressure rises above the setpoint (40 psi). The valve won't stick or freeze thanks to its non-mechanical seat-to-disc alignment. A popular component in commercial boiler systems is the LF174A. It guards against high pressure, which could harm machinery or endanger people's safety. The valve prevents damage to the system by maintaining optimal pressure.