Carrier LH32RF113 Orifice

The Carrier LH32RF113 is a genuine OEM replacement part designed for precise fuel management in residential and commercial gas furnaces. This #33 size natural gas orifice (drill size 0.1130") is engineered to regulate the manifold gas flow, ensuring the burner receives the exact volume of fuel required for an efficient combustion cycle. Fabricated from high-grade brass to resist corrosion and thermal stress, the LH32RF113 maintains a consistent orifice diameter even under high-load residential heating demands. Technical specifications include a weight of 0.04 lbs and standard spud dimensions compatible with Carrier, Bryant, and Payne gas valves and manifold assemblies. For contractors performing a natural gas conversion or replacing a fouled spud, this component provides the specific BTU output calibration required by manufacturer data plates to prevent under-firing or hazardous over-firing conditions in the heat exchanger.

• Ensures accurate BTU input rating by providing a calibrated #33 drill size opening for natural gas applications.
• Manufactured as a genuine Carrier part, guaranteeing exact threading and seating to prevent manifold gas leaks.
• Compatible with a wide range of 1-stage and 2-stage gas valves found in 48-series and 58-series equipment.
• Optimizes the air-to-fuel ratio to maintain high AFUE efficiency and reduce carbon monoxide buildup in the burner assembly.

Is the Carrier LH32RF113 compatible with Propane (LP) systems?
No, this specific orifice is sized (#33) exclusively for natural gas. Propane requires a smaller orifice diameter due to its higher energy density; refer to your unit’s conversion kit guide for the correct LP spud size.

Should I use thread sealant when installing this orifice?
Do not use Teflon tape on gas orifice threads as it can shred and clog the opening. Use a specialized gas-rated pipe dope sparingly or follow the manufacturer’s recommendation for dry-seating to ensure a clean gas path.

How do I verify if a #33 orifice is correct for my altitude?
Orifice sizing depends on both the unit's heating capacity and the installation altitude. Consult the high-altitude derate tables in the furnace service manual to confirm if a #33 size meets the required BTU compensation for your specific elevation.

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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.