Lennox 73W35 Pressure Switch 320819-301 Robust commercial-grade housing protects internal

Robust commercial-grade housing protects internal circuitry while maintaining a professional aesthetic

direct-acting water regulating valve engineered for precision head pressure control in maritime and salt-water applications

For 1-inch or 1-1/4 inch valves

Reliable False-Trip Prevention: The integrated 3-second delay ignores temporary splashes or surges

a failing seal can lead to improper air-to-fuel ratios or pressure switch malfunctions

Lennox 73W35 Pressure Switch 320819-301 Robust commercial-grade housing protects internalThe Lennox 73W35 Pressure Switch is a critical safety and operational component designed for 2 stage gas furnaces. This OEM Lennox replacement part, also identified by part number 102737 09, monitors the pressure differential created by the combustion air inducer to ensure the system is venting correctly before ignition. For multi stage heating, this dual stage pressure switch features precise set points: a high stage set point of 0. 55" W. C. and a