The 18C-522-8-125 features a significantly larger 1" port and a much higher discharge capacity (over 3 million BTU/hr) compared to standard 3/4" residential valves

Which dampers are compatible with the MMP3

Direct OEM Match: Fully interchangeable with part number 41K9301

Rated for 64-77 Microfarad (mfd) at 250Vac

Armstrong Fluid Technology 812961-111 Impeller 320734-701 The 18C-522-8-125 features a significantlyThe Armstrong Fluid Technology 812961 111 Impeller is a precision engineered Noryl plastic impeller specifically designed to restore the hydraulic performance of your Armstrong S 25 circulator pump. This non ferrous plastic component is an essential HVAC replacement part used in heating and cooling systems where resistance to corrosion is paramount. With an outside diameter of 2 3 4 inches, it is manufactured via high quality injection molding to