McDonnell & Miller FS7-4 Switch 30067439-890 the precision-ground stainless steel valve

the precision-ground stainless steel valve instantly lifts from its seat

This control handles standard pilot duty and power loads typical in residential and light commercial air handlers

When you're out on a service call for a dead furnace or air handler

the Lennox 86H46 and Morrison Products R02592A013 are chemically and physically identical components often used interchangeably in Lennox-family brands

this valve features 1/2" NPT inlet and outlet connections and operates on a standard 24V gas valve circuit

McDonnell & Miller FS7-4 Switch 30067439-890 the precision-ground stainless steel valveThe McDonnell & Miller FS7 4 is a heavy duty, industrial liquid flow switch designed for high capacity systems requiring precise monitoring of start stop operations. Engineered with a 1 1 4" NPT connection and a SPDT snap switch, this unit serves as a critical safety interlock for large boilers, chillers, and process cooling applications. It features a maximum operating pressure of 300 PSI and can handle liquid temperatures up to 300F (149C). The Part