White-rodgers 36C03U433S1 Standing Pilot Gas Valve 750 Mv

Product Description

The WHITE-RODGERS 36C03U433S1 is a standing pilot gas valve designed for natural gas and liquid propane (LP) heating systems. It operates on a 750 mV thermocouple-generated coil voltage, meaning no external power source is required — the valve holds open on millivolt signal alone. The 36C03U433S1 features a 3/4 inch inlet and 3/4 inch outlet pipe connection and includes an inlet pressure tap and side taps for field pressure testing and diagnostics. This valve is installed by licensed gas technicians servicing standing pilot heating appliances such as wall heaters, floor furnaces, and gravity furnaces.

The 36C03U433S1 is suited for residential and light commercial standing pilot gas appliances running on natural gas or LP. It is a common replacement component in older heating systems that do not use electronic ignition. The valve fits applications where a 3/4 inch by 3/4 inch pipe configuration is required and where the control circuit operates entirely on millivolt power generated by the standing pilot thermocouple assembly. No 24-volt transformer or line voltage is needed in the control circuit.

Key Features

• 750 mV coil voltage operation — no external power source required
• Compatible with both natural gas and LP fuel types
• 3/4 inch inlet by 3/4 inch outlet pipe connections
• Inlet pressure tap included for field gas pressure verification
• Side taps included for additional pressure diagnostics
• Standing pilot valve type — suited for appliances without electronic ignition

Compatibility

Designed as an OEM-style replacement for standing pilot gas heating appliances requiring a 750 mV millivolt gas valve with 3/4 inch by 3/4 inch pipe connections and compatibility with natural gas or LP fuel.

Installation Notes

Installation must be performed by a licensed gas technician in accordance with local codes and the appliance manufacturer instructions. Shut off the manual gas supply and allow the system to depressurize before removing the existing valve. After installation, use a calibrated manometer at the inlet pressure tap to verify supply pressure before returning the appliance to service. Never overtighten pipe connections — use an appropriate pipe thread sealant rated for gas service on all threaded joints.