always handle the unit by the ceramic base to maintain the integrity of the silicon carbide element and ensure optimal hot surface ignition performance

this backflow rubber parts kit ensures that both the first and second check valves

Visible Calibration: Integrated adjustment knobs and "Sight-Set" scales allow for rapid setpoint verification and field tuning

ensuring compatibility with most standing pilot gas valves

Trane VAL8991 Valve 322057-301 always handle the unit byThe Trane VAL8991 is a core HVAC reversing valve designed specifically for 3 ton heat pump systems. Built to OEM specifications, this 4 way valve manages refrigerant flow direction to switch the system between heating and cooling modes. It features a 1 2 x 3 4 inch sweat connection for precise fitment into standard refrigerant lines. This reversing valve with 24V coil operates on common low voltage control circuits, ensuring seamless compatibility