McDonnell & Miller FS7-4 Switch 30067439-890 The 530 series is specifically

The 530 series is specifically engineered to discharge water

Is the NBR seal compatible with all fluids

Depending on the specific air handler model

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

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

McDonnell & Miller FS7-4 Switch 30067439-890 The 530 series is specificallyThe 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