Description
Product Overview
The Xylem-McDonnell & Miller Model 64 (Part Number 143600) is a dependable, auto-reset mechanical low water cut off engineered to protect both hot water and steam boilers from the hazards of low-water conditions. With a 1″ NPT connection and a maximum boiler pressure rating of 50 PSI, this unit is built to handle a wide range of residential and light commercial hydronic and steam heating applications.
How It Works
The Model 64 uses a proven mechanical float mechanism to continuously monitor boiler water levels. When the water level drops below the safe operating threshold, the device automatically interrupts the burner circuit to prevent dry firing and potential boiler damage. Once water is restored to the proper level, the auto-reset function returns the boiler to normal operation — no manual intervention required.
Key Features
- Auto-reset operation — automatically restores burner function when safe water level returns
- 1″ NPT connection for straightforward installation on standard boiler tappings
- 50 PSI maximum boiler pressure rating
- Compatible with both hot water and steam boiler systems
- Mechanical float design — reliable, time-tested low water detection
- Part Number: 143600
Applications
- Residential and light commercial steam boilers
- Hot water heating boilers
- Hydronic heating systems requiring low water protection
Why Choose McDonnell & Miller
McDonnell & Miller, a brand under Xylem, has been a trusted name in boiler protection controls for decades. The Model 64 continues that legacy with rugged construction, straightforward installation, and reliable performance that keeps boilers — and the people who depend on them — safe.
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