Lennox 47K09 Orifice

The Lennox 47K09 Natural Gas Burner Orifice is a precision-engineered OEM replacement part designed for specific natural gas furnace and heating applications. This #42 orifice spud is calibrated to ensure the correct air-to-fuel ratio, facilitating optimal combustion and consistent flame stability across the burner assembly. As a veteran technician knows, maintaining the exact orifice size is critical for achieving the rated BTU input of the equipment. This component is cross-referenced and is physically identical to the Lennox 47K0901, allowing for seamless integration during field service or manifold repairs. Constructed from high-grade brass, it resists thermal degradation and buildup in high-heat environments. Whether you are performing a seasonal tune-up or a full gas valve manifold overhaul, utilizing the genuine Lennox 47K09 ensures the equipment operates within factory specifications, preventing issues like under-firing or hazardous incomplete combustion in residential and light commercial units.

Key Benefits:

• Ensures precise gas flow and combustion efficiency for natural gas systems.
• Universal compatibility with various Lennox gas-fired equipment requiring a #42 drill size.
• Durable brass construction provides long-term reliability against manifold pressure fluctuations.
• Direct replacement for 47K0901, simplifying inventory and parts matching for contractors.

Common Questions:

What is the difference between Lennox 47K09 and 47K0901?
These parts are functionally identical. The 47K0901 is simply a longer-form part number used in some HVAC replacement parts databases, but they represent the same natural gas orifice.

Can this orifice be used for Propane (LP) conversions?
No. A #42 orifice is specifically sized for the lower energy density of natural gas. Using this in an LP system would result in a dangerous over-fired condition; always use the manufacturer-recommended LP conversion kit for such applications.

How do I know if my burner orifice needs replacement?
Technicians should inspect orifices for signs of physical damage, corrosion, or blockages that cannot be cleared with a soft brush. If you notice uneven flame patterns or soot buildup, the burner orifice may be restricted or improperly sized for the manifold pressure.

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.