York S1-029-20423-042 Orifice

As a veteran HVAC service tech, you know that combustion performance starts with precise fuel metering. The York S1-029-20423-042 #42 Natural Gas Burner Orifice is a genuine OEM York furnace part engineered specifically for technical compatibility with residential and commercial heating units. This #42 drill size orifice is factory-calibrated to deliver approximately 25,000 BTU/hr per burner at standard 3.5" w.c. manifold pressure, ensuring stable flame ignition and preventing high-limit trips or carboning issues caused by overfiring. Constructed from high-grade brass for thermal stability, this natural gas burner orifice maintains consistent bore dimensions under extreme operating temperatures. Whether you are performing a seasonal tune-up or a specific burner assembly repair, using this HVAC gas orifice replacement ensures your system maintains its original factory efficiency and airflow-to-gas ratio. This component is compatible with a wide range of York, Coleman, and Luxaire equipment, specifically fitting model series like the D1CG and D2CG to provide exact gas flow regulation without the need for manual drilling or field modifications.

• OEM Precision: Genuine York replacement part ensures exact #42 orifice sizing for perfect seat alignment and thread engagement.
• Optimized Combustion: Designed for natural gas heating systems to provide a steady flame pattern and maximize thermal transfer.
• Durable Brass Build: Resists corrosion and heat-warping to maintain a consistent gas flow rate over long-term service cycles.
• Broad Compatibility: Standards-compliant for various 42-frame furnace models, reducing the need for extensive truck stock.

• Can I use this #42 orifice for a propane conversion? No, this part is specifically bored for natural gas. Propane requires a smaller orifice (typically #54 or #55) due to its higher energy density and pressure requirements.
• What is the BTU output of a #42 orifice? At a standard 3.5" water column manifold pressure, a #42 drill size orifice typically flows 25,000 BTUs per furnace burner.
• How do I verify if this fits my York furnace? Check the rating plate on your burner manifold; this part is the standard fit for 42-frame applications and is a direct substitute for part numbers found in D1CG and D2CG series.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.