McDonnell & Miller 171802 150S-MD Low Water Cut-Off and Pump Controller

Original price was: $1,297.83.Current price is: $943.70.

15 in stock

SKU: 725909 Category:


The McDonnell & Miller 150S-MD Low Water Cut-Off and Pump Controller is a double-duty champion for your steam boiler, safeguarding against the dangers of low water and streamlining operations. Here’s a quick breakdown:

Safety Guardian:

  • Automatically shuts down the boiler burner if water level falls below a safe point, preventing overheating and potential explosions.
  • Dual switches: One for boiler shutdown and another for alarm or feeder activation, giving you options for additional protection.

Control Commander:

  • Controls the boiler feed pump, ensuring proper water circulation and maintaining optimal water level.
  • Reduces manual intervention: No need to constantly monitor water levels or manually start/stop the pump.

Key Features:

  • Durable: Monel bellows and snap switches handle high temperatures and pressures.
  • Versatile: Works with boilers of any steaming capacity and accommodates various installation configurations.
  • Reliable: Proven design and robust construction ensure years of dependable service.


  • Enhanced safety: Protects your boiler and property from low water hazards.
  • Improved efficiency: Maintains optimal water level for smoother boiler operation.
  • Peace of mind: Automated control and safety features provide constant vigilance.
  • Simplified operation: Reduces manual maintenance and intervention.

Things to consider:

  • Compatibility: Choose the model with the appropriate pressure rating for your boiler.
  • Installation: Proper installation by a qualified boiler technician is crucial for safety and optimal function.
  • Maintenance: Regular testing and inspection are necessary to ensure the Cut-Off and Controller are working correctly.

Overall, the McDonnell & Miller 150S-MD is a valuable investment for your steam boiler system. Its combination of safety, control, and reliability makes it a popular choice for protecting your boiler and ensuring efficient operation.

Additional information

Weight 27.18 lbs


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