McDonnell & Miller RB-122-E Boiler Low Water Cut-Off

The McDonnell & Miller RB-122-E Boiler Low Water Cut-Off provides critical protection for boilers in residential and commercial settings. This probe-type, electronic low water cutoff uses a 3/4 inch threaded port and automatic reset to ensure reliable shutoff when water levels fall below safe limits.

Designed for hot water systems, it handles up to 160 PSI (water) and 250°F water, with ambient temperatures to 120°F. It is powered by 120 V AC input and rated for 5.8 A of load switching, delivering dependable performance in demanding environments.

UL listed for Canada and US protects your installation, with broad applications across residential and commercial systems.

• Probe-type electronic low water cutoff for precise water level sensing
• Port connection: 3/4 inch threaded
• Automatic reset minimizes downtime
• Current rating: 5.8 A (load switching)
• Input supply: 120 V AC
• Temperature rating: 250°F (water) / 120°F (ambient)
• Pressure rating: 160 PSI (water)
• Media handled: Hot water
• Applications: Residential and Commercial
• Probe sensitivity: 20,000 ohms