Lochinvar & A.O. Smith 100112849 Switch 318423-701 3" Insertion Depth: Optimized probe

3" Insertion Depth: Optimized probe length ensures the sensor reaches the hottest point of the air stream for accurate sensing

What are the actual dimensions of this filter

Heavy-Duty Seals: Includes NBR and FPM components for reliable sealing across air and inert gas applications

as a manual reset "Max" control

Universal 1/4" Barb Interface: Simplifies field replacement by utilizing standard 1/4" barb connection points for pneumatic tubing

Lochinvar & A.O. Smith 100112849 Switch 318423-701 3" Insertion Depth: Optimized probeThe Lochinvar & A. O. Smith 100112849 Air Pressure Switch is a critical safety and operational component designed for high efficiency commercial water heaters and boilers, including the GWH 1200 and GWH 1250 Series 600 models. This normally closed (NC) switch is factory calibrated to a 0. 68" water column (w. c.) set point, ensuring the combustion fan is generating sufficient static pressure before allowing the ignition sequence to proceed. As a