Direct OEM Match: Fully interchangeable with part number 41K9301

preventing carbon buildup and soaring CO levels

Industrial-Grade Reliability: Engineered for long-term service in high-cycle environments

This specific model is a natural gas fast-open valve

preventing dangerous unburned gas buildup

Armstrong Fluid Technology 812961-111 Impeller 320734-701 Direct OEM Match: Fully interchangeableThe 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