Versatile Application: Suitable for HVACR vacuum systems

Tasked with ensuring airtight integrity

This part is a #43 drill size orifice

there is no difference

York S1-029-25456-000 Burner Orifice Versatile Application: Suitable for HVACRThe 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