Lochinvar & A.O. Smith 100109913 Gas Valve 321894-708 the Lennox 56J19 is strictly

the Lennox 56J19 is strictly calibrated for R22 or R407C pressures

Vertical Orientation Option: When installed vertically

As a veteran-grade HVAC replacement sensor

The heavy-duty DPST contacts provide reliable switching for high-load commercial mechanical pressure switch applications

Lochinvar & A.O. Smith 100109913 Gas Valve 321894-708 the Lennox 56J19 is strictlyThe Lochinvar & A. O. Smith 100109913 Gas Valve is a 24V slow opening natural gas valve engineered for precision fuel regulation in commercial water heaters and boilers. Designed with a 3 4" NPT inlet and outlet, this combination gas valve serves as a critical component for maintaining stable manifold pressure, factory preset at 3. 5" W. C. to ensure optimal combustion efficiency. This OEM replacement gas valve is a direct substitute for the A. O.