McDonnell & Miller 63M Boiler Low Water Cut-Off

The McDonnell & Miller 63M Boiler Low Water Cut-Off is a heavy-duty boiler low water cutoff that provides essential protection for steam and hot water systems. Featuring mechanical actuation and 1 inch threaded port connections, this unit fits a wide range of boiler configurations. Its compact footprint measures 9-3/8" L x 5-1/8" W x 10-1/2" H, making it ideal for residential, commercial, and industrial installations.

Designed for reliable safety and compatibility, it handles varied electrical demands with efficiency: 10.2 Amp at 120V AC / 5.1 Amp at 240V AC (full load) and 61.2 Amp at 120V AC / 30.6 Amp at 240V AC (locked rotor). The input supply rating is 120/240 Volt AC at 60 Hz (125 Volt Amp), and the device is rated for up to 50 PSI. It is suitable for media such as steam and hot water, ensuring robust protection across boiler types. Inclusions include a manual reset and a two-switch configuration for fail-safe operation.

• Heavy-duty boiler low water cutoff with reliable mechanical actuation
• 1" threaded port connections for easy installation
• Compact dimensions: 9-3/8" L × 5-1/8" W × 10-1/2" H
• Electrical ratings: 10.2A @ 120V / 5.1A @ 240V (full load); 61.2A @ 120V / 30.6A @ 240V (locked rotor)
• Media and pressure: supports steam and hot water up to 50 PSI
• Includes manual reset and two-switch design
• Standards: UL, CSA, FM approved for residential, commercial, and industrial use