McDonnell & Miller 421-30 Boiler Control FloatMcDonnell & Miller 421 30 Boiler Control Float provides reliable, float based control for compatible boiler systems. This Type Float control is designed for use on the 25 A Series Water Feeder and the 27 W Series Liquid Level Control, and it includes a gasket for a secure, leak free seal. Engineered for easy replacement within McDonnell & Miller boiler assemblies, this float control helps maintain accurate water levels, reduces operator adjustments,

delivering consistent signals to ensure reliable burner shutdowns when flames are lost

Voltage & Frequency: 24 VAC

5" D footprint

this actuator is ready for commercial HVAC systems

ensuring reliable performance in compatible gas-fired units

Mounting: Side/End Bracket

This 24V AC-powered unit fits compactly at 4

reduce electrical noise

1/2" female threaded ports for easy piping connections

the ICM492C-LF Line Voltage Monitor from ICM Controls

Use it to reinforce quality control across manufacturing

Durable construction suited for HVAC