• Interrupts power immediately in a low water condition
• Provides contacts for optional low-water alarm, heavy-duty construction
• Automatically restarts burner on return of normal water level
• NEMA 1 enclosure

• Field-adjustable dwell-feed cycles
• Multi color LED status indicator
• Manual feed button
• Hard-stop limit to minimize chances of flooding the boiler
• Compatible with all electronic and mechanical low water cut-off
• Includes adapters for connection to 1/2" copper tubing
• Removable strainer ,
  
  
  

  McDonnell & Miller B112-6

• 125 VA pilot duty rating
• 4-1/8" length insertion
• Packless bellows
• Dual precision switches for dependable operation of the low water cut-off and an alarm or electric water feeder
• For mounting in 2-1/2" NPT boiler side tappings
• Adjustable Bx outlet for easy installation

McDonnell & Miller B106

• 125 VA pilot duty rating
• Quick change replaceable cartridge valve and strainer
• Proportional feed action
• Includes #2 switch

McDonnell & Miller B111-1

• Quick hook-up fittings provided
• Lever operated, full port ball valve for easy blow down
• Adjustable Bx outlet for easy installation
• Dual precision switches for dependable operation of cut-off, alarm or electric water feeder

McDonnell & Miller B103

McDonnell & Miller B115-1

• Continuous maintenance of minimum safe water level, independent of electrical service
• Proportional feed action
• Quick hook-up fittings provided
• Quick change replaceable cartridge valve and strainer
• Model 47 can be field upgraded with a No #2 switch to add low water cut-off function

• Universal compatibility
• Digital feed counter
• Programmable feed delay settings (30 sec - 10 min)
• Programmable feed amount settings (LWCO and 1-5 Gallon)
• Manual feed button
• Underfeed protection
• Lock-out flood protection