Lennox 49K36 Pilot Orifice

For service technicians maintaining high-efficiency furnace systems, the Lennox 49K36 Pilot Orifice is a critical OEM component required for precise gas flow regulation. Designed specifically as a natural gas pilot orifice with a 0.01" aperture, this part ensures the pilot flame remains stable and consistent, preventing nuisance lockouts and delayed ignition issues. This OEM Lennox furnace part is an exact replacement for Lennox 49K36 inlet fittings used in both intermittent and standing pilot ignition systems. Utilizing genuine Lennox HVAC replacement parts like this 0.01 inch orifice preserves the combustion characteristics of the burner assembly, maintaining the manifold pressure and thermal output intended by the manufacturer. Whether you are performing a seasonal tune-up or troubleshooting a pilot that won't stay lit, this 49K36 pilot orifice provides the reliable seating and gas metering necessary for peak furnace performance.

• Precise Gas Metering: The 0.01" orifice diameter is engineered for the exact volumetric flow of natural gas required by compatible Lennox furnace pilots.
• OEM Compatibility: Specifically designed for Lennox G26Q3, G75, G70, and G60 series furnaces, ensuring a perfect fit without the need for field modifications.
• System Reliability: Helps eliminate common ignition failures by providing a steady flame for the thermocouple or flame sensor to detect.
• Durable Construction: High-grade metal construction resists the thermal stress and corrosion typically found in the combustion chamber environment.
• Optimized Combustion: Proper orifice sizing prevents excessive gas waste and soot buildup, keeping the pilot assembly clean for longer service intervals.

Is the Lennox 49K36 compatible with Liquid Propane (LP) systems?
No, this specific part is a natural gas pilot orifice. Using a 0.01" NG orifice on an LP system will result in improper combustion and potentially dangerous operation. Always use the orifice size specified by the manufacturer's LP conversion kit.

What are the signs that a pilot orifice needs to be replaced?
If you observe a weak, yellow, or lifting pilot flame that cannot be corrected by cleaning, or if the furnace is experiencing intermittent ignition failures, the orifice may be partially obstructed or physically damaged and should be replaced.

Does this part include the pilot tubing or burner bracket?
The Lennox 49K36 is the orifice/inlet fitting only. It is designed to be installed into your existing pilot burner assembly using standard HVAC tools.

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.