Resideo 390686-36 Orifice

The Resideo 390686-36 Orifice is a high-precision 0.011 inch pilot burner orifice engineered specifically for liquid propane (LP) applications. Stamped with the BBR11 identifier, this OEM component ensures calibrated fuel flow and flame stability in demanding residential and commercial combustion environments. As a veteran HVAC technician, you know that maintainable ignition starts with the right LP gas orifice; this part is the standard replacement for Resideo Q314, Q345, and Q373 series pilot burners, as well as the Q3450, Q3451, and Q3452 intermittent pilot assemblies. Using a genuine 390686-36/U avoids the common issues of lift-off or yellow tipping often found with non-spec tolerances. This Honeywell Home combustion part is built to withstand high-heat cycles while providing a consistent BTU output, making it an essential stocked item for service rigs performing seasonal maintenance or gas conversion repairs on propane-fired furnace and boiler systems.

• Precise Calibrated Flow: The 0.011" orifice diameter is factory-set to provide the exact gas-to-air ratio required for clean LP combustion.
• Broad Series Compatibility: Directly replaces orifices in Q314, Q345, Q373, Q379, Q3450, Q3451, and Q3452 pilot burner housings.
• OEM Performance: Being a genuine Resideo pilot burner orifice, it maintains original equipment specs for flame rectification and safety circuit integrity.
• BBR11 Stamped Identification: Easy field identification ensures the correct part is installed during high-volume service calls.

Can I use this BBR11 orifice for natural gas applications?
No. This is a dedicated LP gas orifice. For natural gas, you would typically require a larger diameter orifice, such as the BCR18 or BCR20, to account for the lower energy density of the fuel.

Is the 390686-36 compatible with both standing pilot and intermittent ignition systems?
Yes. This orifice is designed to fit the wide variety of Resideo pilot burners, including the older standing pilot Q314 series and the modern electronic Q3450 intermittent pilot systems.

What are the symptoms of a clogged pilot orifice?
A clogged or restricted 11-thou orifice typically results in a weak, lazy pilot flame that fails to engulf the thermocouple or flame rod, leading to nuisance lockouts or "no heat" calls.

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.