Description
McDonnell & Miller 153900 69 – Float Type Low Water Cut-Off for Steam Boilers
Reliable Auto Reset Low Water Cut-Off for Residential & Commercial Steam Boilers
The McDonnell & Miller 69 Low Water Cut-Off is designed for steam boilers of any steaming capacity, providing dependable water level control with dual precision switches for cutoff and alarm or electric water feeder operation. It mounts easily in 2-1/2" NPT boiler side tappings and features a 4-1/8" insertion length, ideal for safe and efficient boiler operation at low steam pressures up to 20 PSI.
Key Features:
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Float-style low water cut-off with automatic reset
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Designed for steam boilers with max steam pressure of 20 PSI
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Fits 2-1/2" NPT boiler side tappings for simple installation
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4-1/8" insertion length and 9-1/2" overall length
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Packless bellows design for durability and leak prevention
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Dual precision switches for low water cutoff and alarm or electric water feeder control
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Optional low voltage switches available for millivolt circuit applications
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Adjustable BX outlet to ease installation
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Suitable for residential and commercial low pressure steam boilers
Specifications
| Attribute | Details |
|---|---|
| Part Number | 153900 69 |
| Application | Steam Boilers |
| Type | Float-Style Low Water Cut-Off |
| Insertion Length | 4-1/8" (105 mm) |
| Mount | 2-1/2" NPT Boiler Side Tappings |
| Max Pressure (PSI) | 20 PSI (Steam) |
| Reset Type | Automatic |
| Switch | Dual Precision Switches |
| Diameter | 4-1/8" |
| Length | 9-1/2" |
| Connection Type | Threaded |
| Thread Size | 2-1/2" |
| Electrical Ratings (ALR) | 22.2 A @ 240 VAC, 44.4 A @ 120 VAC |
| Electrical Ratings (AFL) | 7.4 A @ 120 VAC, 3.7 A @ 240 VAC |
| Pilot Duty Rating | 125 VA |
