York S1-9951-1611 Orifice

As a seasoned technician, you know that precise manifold pressure and burner calibration depend entirely on using the correct York S1-9951-1611 Natural Gas Burner Orifice. This OEM York replacement part is a #20 drill size orifice, engineered specifically for natural gas furnace applications within the York, Coleman, and Evcon families. Featuring a 0.161-inch drill diameter, this component ensures the exact volumetric flow of gas required for clean combustion and optimal thermal output. The physical specs are industry standard for many residential units: a 1/2-inch hex head for easy socket engagement, 3/8-inch overall length, and 7/16-27 UNS threads for a leak-free fit onto the gas manifold. Whether you are performing a furnace burner orifice replacement during a standard tune-up or restoring a unit after a conversion, using this genuine S1-9951-1611 gas orifice maintains the appliance's original efficiency ratings and flame stability. Avoid the risks of "close-enough" aftermarket sizing by sticking with Source 1 technical specifications for your HVAC burner maintenance.

• Precision Flow Control: The #20 (.161") drill size provides the exact BTU input required for supported natural gas heating systems.
• OEM Compatibility: Designed as a direct drop-in for York, Coleman, and Evcon furnaces, ensuring proper thread engagement and alignment.
• Durable Brass Construction: High-grade machining resists corrosion and maintains orifice integrity under constant thermal cycling.
• Facilitates Accurate Combustion: Helps eliminate common issues like yellow tipping or lifting flames caused by incorrect orifice sizing.

• Is this orifice used for Propane (LP) conversions? No, this is a natural gas orifice. LP conversions require significantly smaller drill sizes due to the higher energy density and pressure requirements of propane.
• What tools are needed for installation? A standard 1/2-inch deepwell socket is typically used to remove the old orifice from the manifold and seat the new one.
• How do I verify if this fits my specific furnace? Check your furnace data plate for the required orifice number; this is a #20 orifice which is common in many York residential models.

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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.