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the valve seat (typically part number 25A-14) is a separate component and should be inspected for scoring when the stem is removed
suitable for direct compressor control or pilot duty
The EPDM diaphragm offers superior thermal resistance
This component is essential for maintaining HVAC safety standards and protecting the unit from catastrophic overheating
Lennox 12B75 Vent Hood L99H008 the valve seat (typically partThe Lennox 12B75 is a professional grade horizontal vent termination hood engineered for high efficiency furnace and air handler applications. This HVAC vent hood is a critical component for maintaining secondary heat exchanger health, providing a robust terminal point that directs flue gases away from the structure while preventing environmental ingress. Designed specifically for Lennox furnace venting, the 12B75 utilizes a heavy duty construction to
