this switch provides reliable circuit interruption to prevent damage to the primary heat exchanger and ensure combustion safety

such as the TS394 sensor and M/MR series valves

this harness is built to withstand the rigorous ambient conditions typical of a boiler cabinet

The McDonnell & Miller 334100

With a ±1% FS accuracy rating

Lochinvar & A.O. Smith 100276822 Cutoff 319852-301 this switch provides reliable circuitThe Lochinvar & A. O. Smith 100276822 Cutoff is a critical safety component designed for high efficiency hydronic systems, including the Lochinvar FT series and AQUAS Low NOx pool heaters. This low water cutoff utilizes a sophisticated electronic probe to monitor boiler water levels in real time, providing an essential defense against dry firing. Operating on a 24V circuit, the 100276822 features a dual auto manual reset configuration, allowing