- Mechanical Water Feeder, High Capacity (Low Water Cut-Off).
- Catalog Number: 135600.
- McDonnell & Miller model number 51S is float-operated make-up water feeder for low pressure steam or hot water boilers with a capacity larger than 35,000 square feet. This water feeder features a continuous maintenance of minimum safe water level independent of electrical service and tapped 1" FIP connection. Its maximum water pressure is 100 psi and steam pressure is 35 psi.
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