System Compatibility: Ideal for use with water or up to 50% ethylene glycol mixtures in closed-loop systems

Hardware Resilience: Built to withstand the harsh environment of a compressor terminal box

90" WC trip point with a manometer is essential before swapping this HVAC draft pressure switch

even in complex geometric configurations

Key Benefits for HVAC Professionals Precision Thermal Protection: Calibrated to trip at exactly 248°F to prevent catastrophic component failure

Lochinvar & A.O. Smith 100294585 Pressure Switch System Compatibility: Ideal for useWhen you're out on a service call and a high efficiency Lochinvar boiler or A. O. Smith water heater isn't firing, the 100294585 Pressure Switch is often the technical culprit. This 0. 68" WC pressure switch is a critical safety component designed to calibrate the air to fuel ratio by monitor differential pressure within the combustion chamber. As a direct OEM replacement part for the discontinued 100166118 and PRS20024, it ensures the inducer motor