McDonnell & Miller 51-2 Water Feeder/Low Water Cut-Off

The McDonnell & Miller 51-2 Water Feeder/Low Water Cut-Off delivers reliable automatic water feeding and low-water protection for boiler systems. This compact unit features a 1 inch threaded port connection and mechanical actuation for straightforward installation and dependable performance.

• 1" threaded port connection for easy piping and compatibility
• Mechanical actuation provides precise, maintenance‑friendly control
• Series 2 Switch included for robust switching
• UL and CSA compliant for safety and industry compatibility
• Electrical ratings: 120 VAC up to 10.2 A (full load) / 61.2 A (locked rotor); 240 VAC up to 5.1 A (full load) / 30.6 A (locked rotor)
• Input supply: 120/240 VAC, 60 Hz, 125 VA
• Temperature rating: 120°F inlet water
• Pressure rating: 150 PSI (water) / 35 PSI (vessel)
• Media: Water
• Overall dimensions: 10-3/8 inch diameter

Designed for reliability in both commercial and residential boiler installations, this feeder/cut-off helps prevent dry firing while maintaining efficient operation and system longevity. UL/CSA approval and a robust Series 2 switch ensure dependable performance across a range of voltages.