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Always verify the part number and pitch length before installation
ensuring stable flame sensing and burner sequence management
typically rated up to 150
It features a high-grade solenoid valve piston assembly
ensuring the heating system functions independently of electrical grid outages
McDonnell & Miller FS4-3 Switch Els PW 17895 Always verify the part numberFor contractors requiring reliable system protection, the McDonnell & Miller FS4 3 (Part Number 114400) is a heavy duty general purpose liquid flow switch designed to monitor flow in heating, cooling, and water process lines. This 1" NPT unit features a single pole, double throw (SPDT) configuration, allowing you to easily integrate signal lights, alarms, motors, or burners into the control circuit. Engineered to operate at a max pressure of 160 PSI