if your specific application requires a free-flow gravity feed

making it suitable for industrial automation and 24/7 HVACR operations

Check the stamping on your existing blade or consult the unit’s parts list for part number 45946 or the Brookside SN4-1636 XL170 designation

making it a versatile choice for direct control of AC motors or as part of a more complex safety circuit

allowing for different temperature zones on a single compressor rack

Lochinvar & A.O. Smith 100108826 Pressure Switch 318820-201 if your specific application requiresThe Lochinvar & A. O. Smith 100108826 Pressure Switch is a critical safety component designed for precise draft monitoring in high efficiency commercial water heaters and boilers. This SPDT (Single Pole Double Throw) pressure switch serves as a reliable interface for the control board, verifying that the inducer blower is pulling the correct static pressure before allowing the ignition sequence to proceed. Engineered as a genuine OEM replacement part,