Lochinvar & A.O. Smith 100318326 Pressure Switch 321894-709 specifically within air handlers and

specifically within air handlers and duct transition points where clean-out access is required

ensuring a secure mechanical interface with standard damper linkages

This 2-way normally closed valve features 3/8-inch flare connections and is engineered for high-cycle applications where reliability is critical

Stop wasting time chasing down specific OEM part numbers

Lochinvar & A.O. Smith 100318326 Pressure Switch 321894-709 specifically within air handlers andThe Lochinvar & A. O. Smith 100318326 Pressure Switch is a critical safety component designed for precise water pressure monitoring in high efficiency Noble Fire Combi Boilers and NKC series units. Engineering to detect low water pressure conditions, this switch acts as a primary fail safe, preventing dry fire scenarios and potential heat exchanger damage by ensuring the burner circuit remains open unless sufficient system pressure is established.