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The Switch Assy MM150S is a micro switch component engineered for the Mechanical Low Water Cutoff and Feeder (MM150) system on Mr.Steam Commercial CU model steam bath generators, models CU2000 through CU4500. This switch monitors water level within the mechanical feeder assembly, triggering the low water cutoff function to help prevent the generator from operating in a dry-fire condition. Reliable low water cutoff function is a critical safety feature in commercial steam room operation, protecting heating elements and the pressure vessel from damage due to insufficient water. As part of the broader MM150 mechanical assembly, this switch works alongside related components like the head gasket and float rod and ball assembly to maintain accurate water level detection. Built for the demands of continuous commercial use, this genuine Mr.Steam replacement part restores dependable low water cutoff monitoring, helping facility operators maintain safe, code-compliant system oversight without needing to replace the entire MM150 feeder assembly.

  • Low Water Cutoff Function – Monitors water level within the MM150 mechanical feeder, triggering cutoff to help prevent dry-fire operation.
  • Commercial CU-Series Fit – Sized and configured specifically for CU2000–CU4500 Commercial Steam Bath Generators.
  • Part of MM150 Assembly System – Works alongside the head gasket and float rod and ball assembly for accurate water level detection.
  • Targeted Component Replacement – Allows replacement of just the switch rather than the entire MM150 mechanical feeder assembly.
  • Genuine OEM Fit – Designed specifically for Mr.Steam's mechanical low water cutoff system.
  • MPN: 103914
  • UPC: 767931901201
  • Compatibility: Mr.Steam Commercial CU model steam bath generators, CU2000–CU4500 (Mechanical Low Water Cutoff and Feeder, MM150)
  • Part Type: Micro Switch Assembly
  • What's Included: (1) Switch Assembly
  • Weight: 1 lb
  • Country of Origin: United States
  • Warranty: Not specified
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Switch Assembly, MM150S | Mr. Steam

SKU: MRS-103914
Regular price $631.00
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The Switch Assy MM150S is a micro switch component engineered for the Mechanical Low Water Cutoff and Feeder (MM150) system on Mr.Steam Commercial CU model steam bath generators, models CU2000 through CU4500. This switch monitors water level within the mechanical feeder assembly, triggering the low water cutoff function to help prevent the generator from operating in a dry-fire condition. Reliable low water cutoff function is a critical safety feature in commercial steam room operation, protecting heating elements and the pressure vessel from damage due to insufficient water. As part of the broader MM150 mechanical assembly, this switch works alongside related components like the head gasket and float rod and ball assembly to maintain accurate water level detection. Built for the demands of continuous commercial use, this genuine Mr.Steam replacement part restores dependable low water cutoff monitoring, helping facility operators maintain safe, code-compliant system oversight without needing to replace the entire MM150 feeder assembly.

  • Low Water Cutoff Function – Monitors water level within the MM150 mechanical feeder, triggering cutoff to help prevent dry-fire operation.
  • Commercial CU-Series Fit – Sized and configured specifically for CU2000–CU4500 Commercial Steam Bath Generators.
  • Part of MM150 Assembly System – Works alongside the head gasket and float rod and ball assembly for accurate water level detection.
  • Targeted Component Replacement – Allows replacement of just the switch rather than the entire MM150 mechanical feeder assembly.
  • Genuine OEM Fit – Designed specifically for Mr.Steam's mechanical low water cutoff system.
  • MPN: 103914
  • UPC: 767931901201
  • Compatibility: Mr.Steam Commercial CU model steam bath generators, CU2000–CU4500 (Mechanical Low Water Cutoff and Feeder, MM150)
  • Part Type: Micro Switch Assembly
  • What's Included: (1) Switch Assembly
  • Weight: 1 lb
  • Country of Origin: United States
  • Warranty: Not specified