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

Can this be used for LP conversion

there is no difference

These bushings are designed to "bite" and lock permanently

As a veteran-grade HVAC orifice

York S1-029-25456-000 Burner Orifice This high-temperature combustion seal ensuresThe 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