York S1-029-21182-042 Orifice

The York S1-029-21182-042 Natural Gas Orifice is a precision-engineered brass component essential for managing fuel delivery in residential and light commercial gas-fired equipment. This #42 drill size orifice is manufactured to strict OEM tolerances, ensuring a consistent BTUh input per burner by maintaining a fixed diameter of .042 inches. For veteran technicians, this part is a standard requirement when performing natural gas to propane conversion (or vice-versa with the appropriate kit) or when replacing clogged and corroded orifices that lead to poor combustion efficiency. Correct orifice sizing is critical for achieving the proper air-to-fuel ratio and preventing issues like delayed ignition or soot buildup. Designed as a direct York burner orifice replacement, the S1-029-21182-042 threads securely into the gas manifold, providing a robust seal and localized control of gas velocity. Utilizing genuine York HVAC parts ensures that the system maintains its original engineering specifications, keeping manifold pressure stable and furnace operation reliable during peak heating demand.

• Precision Metering: Machined from high-grade brass to ensure exact natural gas flow regulation and thermal output.
• Direct OEM Compatibility: Engineered specifically for York, Luxaire, and Coleman gas furnaces to eliminate fitment issues.
• Optimized Combustion: Helps restore the proper flame pattern and prevents furnace short cycling caused by improper fuel delivery.
• Durable Construction: Resistant to high-temperature oxidation and chemical corrosion within the burner assembly.

Is the S1-029-21182-042 suitable for high-altitude installations?
Standard #42 orifices are typically rated for sea-level installations. For high-altitude applications, technicians must consult the manufacturer’s derate tables to determine if a different orifice drill size is required to compensate for lower oxygen density.

Can I use this orifice for an LP conversion?
No, this specific part is sized for natural gas applications. Propane requires a significantly smaller orifice diameter due to its higher energy density; always use the designated conversion kit for your specific model.

How do I identify a clogged gas orifice?
Inspect the burner for a weak, yellow, or lifting flame. If the manifold pressure is correct but a single burner is underperforming, the York S1-029-21182-042 may be obstructed by debris or carbon deposits.

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.