McDonnell & Miller 67 Boiler Low Water Cut-Off

The McDonnell & Miller 67 Boiler Low Water Cut-Off is a float-type safety device designed to protect steam boilers by monitoring water level and automatically shutting off the boiler if levels fall too low. This lever/mechanical actuation model delivers reliable, maintenance-friendly protection for both residential and commercial systems, helping prevent costly damage and downtime.

Designed for flexible installation, it uses multiple port connections (1/4" x 3/8" x 3/4" threaded) to fit a wide range of boiler piping configurations and is suitable for both new installs and retrofits. It handles steam and water media, and supports standard electrical ratings to match most residential and commercial systems, ensuring dependable performance under varying load conditions.

• Type: Float
• Actuation: Lever/Mechanical
• Ports: 1/4" x 3/8" x 3/4" threaded
• Dimensions: 9-23/32" length
• Electrical ratings: 7.4 A @ 120V, 3.7 A @ 240V (full load); 44.4 A @ 120V, 22.2 A @ 240V (locked rotor)
• Input supply: 120/240V AC, 125V Amp
• Media handled: Steam, Water
• Pressure rating: 20 psi (Steam)
• Applications: Residential, Commercial
• Standards: UL, CSA, FM

Designed for reliable, code-compliant performance, the McDonnell & Miller 67 Boiler Low Water Cut-Off provides essential protection for boiler systems, backed by UL, CSA, and FM standards.