McDonnell & Miller 47 Feeder

The McDonnell & Miller 47 serves as a reliable mechanical water feeder specifically designed for low-pressure steam and hot water boilers. This unit features Quick Hook-Up fittings for 1-inch NPT equalizing lines, significantly reducing installation time on-site. Engineered for systems with a cold water feed, the Series 47 maintains precise water levels to prevent dry-fire conditions. The proportional feed action ensures a steady response to fluctuating boiler demands, while the integrated strainer protects the internal valve mechanism from pipe scale and debris. This mechanical boiler feed is rated for a maximum steam pressure of 25 psi and a maximum water pressure of 150 psi. For contractors replacing legacy units, the 132700 model offers a direct-fit solution that eliminates the need for extensive repiping, ensuring the boiler water level control remains within manufacturer specifications.

Key Benefits for Technicians:

• Quick Hook-Up Fittings: Simplifies the installation of equalizing lines without manual pipe threading.
• Continuous Mechanical Operation: Provides non-electric boiler water makeup, ensuring protection even during power outages.
• Field-Serviceable Design: Large sediment chamber and strainer allow for easy blow-down and maintenance.
• Proportional Feeding: Minimizes thermal shock to the boiler by introducing water in smaller, controlled increments.

Common Installation Questions:

Does this unit replace the 47-2 feeder?
The Series 47 is the feeder-only version. If your application requires an integrated low water cut-off switch, you should utilize the 47-2 variant.

What is the maximum boiler pressure for this feeder?
This McDonnell & Miller 132700 is designed for low-pressure applications up to 25 psi of steam pressure.

Can I use this for a hot water heating boiler?
Yes, the McDonnell & Miller 47 is compatible with both steam and hot water systems requiring a continuous cold water feed.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.