Lennox 31W19 Flue Transition 318423-701 For bypass or heat pump

For bypass or heat pump applications requiring the valve to open on pressure decrease

ideal for signaling alarms or interlocks

Enhanced Signal Reliability: High-grade trace pathways ensure consistent electrical connectivity for critical safety and sensors

What happens if I exceed the 50VA power rating

this valve utilizes a solid wax hydraulic principle thermostat to maintain outlet temperatures within a tight +/- 3°F tolerance

Lennox 31W19 Flue Transition 318423-701 For bypass or heat pumpThe Lennox 31W19 Flue Transition is a critical induced draft component engineered for high performance Lennox packaged HVAC systems. As an essential OEM replacement part, this flue exhaust transition manages the path of combustion gases from the heat exchanger to the external vent, preventing backdraft and ensuring safe equipment operation. Fabricated to strict factory tolerances, the 31W19 eliminates the alignment issues ????? associated with