Maxitrol R400S-3/8 Gas Pressure Regulator 3/8" NPT 5 PSI Inlet 3"-8" WC Spring Out

The Maxitrol R400S-3/8 Gas Pressure Regulator with 3/8 inch NPT connection, 5 PSI inlet, and 3"-8" WC spring is a control component applied in gas-fired heating HVAC systems to control the pressure of the fuel. It works by decreasing and maintaining the incoming gas pressure to the amount needed by the burner assembly of the appliance to ensure the same performance in combustion. This regulator is normally fitted in residential and light commercial furnaces, boilers, and other such systems.