As a veteran-grade HVAC orifice

This high-temperature combustion seal ensures the ignitor remains seated correctly

there is no difference

This part is a #43 drill size orifice

Built from high-density

York S1-029-25456-000 Burner Orifice As a veteran-grade HVAC orificeThe York S1 029 25456 000 Burner Orifice is a precision engineered component designed for high efficiency gas furnace manifolds. This #43 burner orifice features a . 089 inch diameter aperture, specifically calibrated to ensure exact BTU input ratings and optimal combustion performance across compatible York, Coleman, and Luxaire heating systems. As a direct replacement for S1 029 20423 043, this 2 groove (2Grv) model maintains the critical gas flow