McDonnell & Miller RB-24E

McDonnell & Miller® RB-24E Electronic Low Water Cut-Off, 3/4 Inch NPT, 160 psi, 24 V, Pilot Duty 2.5 VA at 24 VAC


Manufacturer part number:



Bell Gossett - Xylem

McDonnell & Miller® Low Water Cut-Off, Electronic, 3/4 Inch NPT, 24 V, Pilot Duty: 2.5 VA at 24 VAC, 15000 Ohm, 160 psi, 120 deg F, Brass

  • Brass threads provide a metal to metal seal that ensures a leak free installation
  • Integrated wrench flats enable secure installation without damage to the housing
  • McDonnell & Miller’s patented self-cleaning probe minimizes scale build-up and extends the recommended cleaning interval to 5 years
  • Plug & Play' wiring harnesses are available for most residential gas burning boilers
  • Designed, built and tested at Xylem’s production facility in Morton Grove, IL USA
  • Test button to quickly confirm proper operation
  • Universal wiring harness fits 100% of today’s gas boilers
  • Compact size
  • Easy to install and wire
  • Automatic reset feature resumes operations after a power outage when water is on probe
  • Green LED indicating power on
  • Red LED indicating low water condition
  • Solid state operation



Standard/Approvals: CSA Certified, UL Listed

Application: Residential


Products specifications
Attribute nameAttribute value
Connection Type3/4 Inch NPT
Pilot Duty Rating2.5 VA at 24 VAC
Pressure Rating160 psi
Sensitivity15000 Ohm
Temperature Rating120 deg F
Voltage Rating24 V