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Encased in a durable NEMA 1 rated red housing
It is primarily used in hydronic heating
What is the difference between a manual and automatic reset switch
utilizing the same union connections and 1/2-inch sizing for direct replacement
Resideo FM911 Valve Els PW 17895 Encased in a durable NEMAThe Resideo FM911 (identical to the FM911 U) is a high performance boiler fill valve and backflow preventer combo engineered for precise hydronic heating system maintenance. This 1 2 inch assembly features a pressure regulating valve factory preset at 12 PSI, though it is field adjustable from 4 to 60 PSI to accommodate systems in buildings up to 12 stories. Designed specifically for expansion tank mounting, the unit utilizes a balanced seat piston
