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Honeywell FM911

Backflow Preventer and Boiler Fill Valve Combo Assembly

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The Honeywell FM911 is a pressure regulating valve for automatic control of boiler feed water and other pressure reducing applications. Especially constructed for expansion tank mounting.

Standard Features:

  • BP900 backflow preventer and FM451 pressure regulating valve in one pre-assembled unit
  • Built-in check valve
  • Fast fill feature
  • Adapter included for NPT or sweat connections
  • Regulating pressure range: 4 PSI to 60 PSI; preset at 12 PSI

Maximum Temp Rating
212 °F
PSI
150
Connection Type
NPT (Threaded)
Connection Diameter
1/2 Inches

In 2002 Alpine Home Air Products became the first company to sell heating, air conditioning and indoor air-quality products online. We have proudly served hundreds of thousands of customers, helping them save time and money by buying their products direct.