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the 20-250 series valves can accommodate different glass lengths
ideal for signaling alarms or interlocks
As the direct 040-0163-01 replacement
For bypass or heat pump applications requiring the valve to open on pressure decrease
Lennox 31W19 Flue Transition 318423-701 the 20-250 series valves canThe 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
