McDonnell & Miller RB-24E Boiler Low Water Cut-Off

The McDonnell & Miller RB-24E Boiler Low Water Cut-Off is a dependable low water cutoff designed for residential boilers. With a solid-state/electronic actuation system and a sensing probe, it protects your boiler by detecting low water levels and triggering an automatic shutdown when needed.

Featuring a 3/4 Inch threaded port and compact dimensions (1-7/8 Inch diameter x 5-3/4 Inch length), this unit delivers reliable performance with a 2 Amp current rating and 24 Volt AC input. Its temperature rating of 120 Deg F ambient and 250 Deg F for water, along with 160 PSI water pressure, ensures safe operation across typical residential systems. The probe sensitivity of 15000 Ohm helps accurate detection, while automatic reset provides convenient reuse after the issue is resolved.

• Application: Residential boiler protection
• Actuation: Solid State / Electronic
• Port: 3/4" threaded connection
• Electrical: 24 VAC input; 2 A current rating
• Media: Water
• Temperature & Pressure: 120°F ambient / 250°F water; 160 PSI
• Inclusion: Automatic reset
• Compliance: UL (Canada and US)
• Probe: 15000 Ohm sensitivity