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It features a manual test lever for routine maintenance and is certified under ANSI Z21
High Ambient Rating: Class B insulation and 60°C ambient design provide durability during peak summer loads
potentially damaging the plastic housings common in modern condensing furnace components
including Intertherm and Miller
Resideo FM911 Valve 30067439-890 It features a manual testThe 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
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