What is the purpose of the dual SPDT contacts

Enhanced System Safety: Restores proper flame patterns to reduce the risk of heat exchanger damage

This lead-free atmospheric vacuum breaker features a durable brass body and a 1/2-inch female NPT connection

Delivering 180 lb-in torque

Is this cover compatible with the S7800A1140

Lennox 11J12 Pressure Switch 323613-751 What is the purpose ofEnsure your combustion air system is operating within manufacturer parameters with the Lennox 11J12 Pressure Switch. This critical safety component is a high altitude specific differential switch designed for Lennox furnace repair and maintenance, featuring a factory set . 85" WC pressure switch actuation point. Engineering for precise draft proving, this part monitors the static pressure within the inducer housing to confirm proper venting before