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Safety Compliance: Restores factory-specified safety parameters to the heating circuit after a primary limit failure
decreased airflow
but technicians should always verify the wiring diagram on the boiler's control cabinet before installation
Enhanced Safety: Built-in pressure tap ensures accurate draft-proving switch performance
Armstrong Fluid Technology 816304-317K Plastic Impeller 318518-761 Safety Compliance: Restores factory-specified safetyThe Armstrong Fluid Technology 816304 317K Plastic Impeller is a precision engineered circulator pump replacement part designed to restore peak hydraulic efficiency to your HVAC system. This 5 1 4" Noryl impeller is manufactured from high quality, non ferrous composite materials, offering superior corrosion resistance and durability in demanding hydronic applications. As the official 816304 317K maintenance kit, it serves as the direct OEM pump
