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the Lennox 56J19 is strictly calibrated for R22 or R407C pressures
As a veteran-grade HVAC replacement sensor
Vertical Orientation Option: When installed vertically
this OEM replacement will restore the necessary vacuum levels for the pressure switch to close
Enhanced Reliability: Gold contacts prevent oxidation in low-voltage circuits
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.
US$ 16199.50
US$ 130.00