50" WC pressure switch designed specifically for Lennox

As a veteran-grade solution for managing low water cut-off (LWCO) signals

Designed for clockwise (CW) rotation with a 5/8" bore located on the discharge side

While optimized for KMC VEZ valves

Field-Adjustable Range: Set point flexibility from 0

Mueller Industries A17939 Check Valve 323613-751 50" WC pressure switch designedThe Mueller Industries A17939 is a high performance 7 8" Magnetic Check Valve designed for critical backflow prevention in commercial refrigeration and air conditioning systems. Engineered with a hermetically formed solid copper body, this valve eliminates potential leak paths, ensuring system integrity under high pressure conditions up to 800 PSI (55 bar). The internal magnetic mechanism provides a positive seal with a minimum pressure differential