this kit is specifically designated with the "K" suffix

general-purpose control designed for high-reliability flow detection in hydronic heating and cooling systems

this probe features a 1/2" NPT male-threaded connection and a remote mount configuration for versatile installation in steam or hot water boilers

though it is best practice to install the actuator in the upright position to prevent moisture from entering the motor or diaphragm assembly

Lennox 11U71 Pressure Switch 322057-301 this kit is specifically designatedThe Lennox 11U71 High Altitude Pressure Switch is a critical safety component designed for furnace pressure switch replacement in systems operating at elevations between 4,500 and 7,500 feet. Calibrated with a precise 0. 85" WC (water column) actuation point, this OEM Lennox part ensures the inducer motor generates sufficient static pressure for safe combustion before allowing the gas valve to energize. This specific 104371 08 model is a SPST N. O.