Description
Xylem-McDonnell & Miller 47-2 Mechanical Water Feeder
The McDonnell & Miller 47-2 (Part Number 132800) is a heavy-duty mechanical water feeder engineered for reliable operation on both steam and hot water boilers. Combining a cold water feed function with a low water cut-off in a single, compact unit, the 47-2 simplifies boiler room installations and reduces the number of individual components required to protect your system.
Key Features
- Dual-function design: cold water feed and low water cut-off in one unit
- Quick hook-up fittings for fast, straightforward installation
- Two snap-acting SPDT (Single-Pole Double-Throw) switches for reliable electrical control
- Compatible with both steam and hot water boiler systems
- Mechanical float-based operation — no external power required for water sensing
- Durable construction designed for the demanding boiler room environment
- Part Number: 132800
How It Works
The 47-2 uses a mechanical float mechanism to continuously monitor boiler water level. When the water level drops to the low-water threshold, the unit simultaneously triggers the low water cut-off function — shutting down the burner to prevent dry-fire damage — while opening the water feed valve to restore the proper water level. The two snap-acting SPDT switches provide crisp, reliable switching action for burner control circuits, minimizing contact wear and ensuring consistent performance over time.
Quick Hook-Up Fittings
The included quick hook-up fittings reduce installation time and labor. These fittings allow the 47-2 to be connected to the boiler’s water supply and return lines without the need for complex piping configurations, making it an ideal choice for both new installations and retrofit applications.
Applications
- Residential and light commercial steam boilers
- Hot water heating boilers
- Retrofit replacement for aging low water cut-off and feeder combinations
- New boiler installations requiring combined feed and cut-off protection
Why Choose the McDonnell & Miller 47-2?
McDonnell & Miller, a brand of Xylem, has been a trusted name in boiler water level controls for decades. The 47-2 reflects that legacy of quality — delivering dependable low water protection and automatic water feeding in a single, easy-to-install package. Protect your boiler investment and ensure safe, efficient operation with this proven combination control.
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