is a pilot-operated

Key Benefits: Precise Pressure Calibration: Operates at an exact 575 psi trip point to protect high-side components from excessive thermal stress

as well as POE oils and mineral lubricants

and two piston O-rings to eliminate leak paths

Noise Reduction: Factory-balanced design minimizes vibration

Watts 0386450 Regulator Els PW 17895 is a pilot-operatedThe Watts 0386450 S1156F is a high capacity boiler feed water pressure regulator designed for rigorous performance in residential and commercial hydronic heating systems. Built with a rugged iron and bronze body, this 1 2" water pressure reducing valve ensures consistent boiler pressure by automatically filling the system and maintaining prime. The S1156F model features a union solder inlet for reliable, leak free integration into copper supply lines.