Resideo 390686-5 Orifice

The Resideo 390686-5 Orifice is a high-precision .020-inch natural gas pilot orifice designed for reliable ignition performance across a broad range of Resideo pilot burner assemblies. Stamped with the BCR20 identification code, this component ensures calibrated fuel delivery and stable flame geometry for critical heating applications. It is fully compatible with the Q314, Q327, Q345, Q362, Q373, Q379, Q380, Q3450, Q3451, and Q3452 series, making it a versatile stock item for service vans. This part is functionally identical to the 390686-5/U universal designation, providing a direct-fit solution for maintaining intermittent pilot and standing pilot systems. Engineered to meet strict burner tolerances, it helps prevent nuisance callbacks caused by poor flame sensing or pilot outage. Contractors can rely on this genuine Resideo part for precise BTU input control and long-term durability in residential or light commercial furnace and boiler equipment.

Key Benefits

• Universal Compatibility: Fits an extensive range of Q-series pilot burners, reducing the need for multiple SKUs.
• Precise Gas Flow: The 0.020" orifice diameter is factory-calibrated for efficient natural gas combustion.
• Easy Identification: Clearly stamped with BCR20 for quick verification in the field and accurate cross-referencing.
• OEM Performance: Ensures exact pilot flame sensing and reliable main burner ignition.

Common Questions

Is the 390686-5 compatible with LP (Propane) systems?
No, this specific orifice is calibrated only for natural gas. For Liquid Propane conversions, a different orifice diameter is required to match the higher energy density of the fuel.

What is the difference between the 390686-5 and the 390686-5/U?
They are identical parts. The "/U" suffix denotes universal packaging for the retail/wholesale channel, but the technical specifications and BCR20 stamp are the same.

Can this orifice be used with any pilot burner?
It is specifically engineered for Resideo and Honeywell Home pilot burners including the Q314, Q345, and Q3450 series. Always check the stamp on your existing orifice before replacement.

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.