Atwood / Dometic Furnace Burner Orifice – #51LP (Special Order)

Furnace Burner Orifice – #51LP for Atwood RV Furnaces

The Atwood / Dometic #51LP Furnace Burner Orifice is a precision gas metering component designed for use in Atwood RV furnace burner assemblies. This propane orifice controls the exact amount of LP gas entering the burner, ensuring the proper air-fuel mixture needed for efficient ignition and consistent heating performance.

If your RV furnace is experiencing weak flames, inconsistent heating, delayed ignition, or burner ignition failures, the burner orifice may be clogged, damaged, or worn and require replacement.

Replacing the orifice restores the proper propane flow required for safe and reliable furnace operation.

⚠️ Special Order Item – Ships in 7–14 days

Features

• Replacement burner orifice for Atwood RV furnaces
• #51LP propane orifice size
• Precision metering for proper LP gas flow
• Helps restore correct flame size and furnace performance
• Durable brass construction
• Designed for Atwood / Dometic furnace burner systems

Common Symptoms of a Faulty Burner Orifice

Your RV furnace may need a new burner orifice if you notice:

• Weak or unstable burner flame
• Furnace ignites but produces little heat
• Delayed ignition or flame rollout
• Furnace repeatedly tries to ignite
• Inconsistent propane flow to the burner

Over time, burner orifices can become restricted by debris, oil residue in propane, or corrosion, which reduces the amount of gas reaching the burner.

FAQ

What does the furnace burner orifice do?

The burner orifice regulates the amount of propane entering the furnace burner, creating the correct mixture of air and fuel needed for combustion.

What does “#51LP” mean?

The #51 refers to the precision drill size of the orifice opening, which determines how much propane flows to the burner.

Can a clogged orifice cause furnace ignition problems?

Yes. If the orifice is partially blocked, the furnace may produce weak flames, delayed ignition, or fail to heat properly.

Can I clean a burner orifice?

Minor debris may sometimes be removed, but since orifices are precision sized, replacement is often recommended if performance problems persist.