Armstrong Fluid Technology 816304-317K Plastic Impeller R-407C generally featuring a 1/2-inch shaft

generally featuring a 1/2-inch shaft

Surface debris can sometimes be removed

Maintains OEM performance specs by providing the correct liquid propane orifice sizes for specific BTU inputs

and MXZ-4C36NA

the locknut secures the adjustment screw to maintain a consistent output

Armstrong Fluid Technology 816304-317K Plastic Impeller R-407C generally featuring a 1/2-inch shaftThe 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