McDonnell & Miller 5-M Switch 30067439-890 ensuring drop-in installation without field

ensuring drop-in installation without field modifications

maintaining the system integrity required for veteran contractors managing legacy hydronic configurations

Can I use this as a substitute for a 4-blade assembly

replacing a brittle or cracked boiler ignition lead is essential for preventing voltage leakage and ensuring consistent spark delivery

The 1/2 inch NPT connection ensures compatibility with standard piping

McDonnell & Miller 5-M Switch 30067439-890 ensuring drop-in installation without fieldThe McDonnell & Miller 5 M Switch (Part Number 110400) is a critical safety component designed for heavy duty steam boiler control. This manual reset general purpose switch is engineered specifically to interface with Series 93, 193, 94, and 194 combination low water cut off and pump controllers. Featuring a 2 SPDT (dual single pole, double throw) configuration, the 5 M allows for the simultaneous management of independent circuitstypically the burner