Resideo 390686-1 Orifice Assembly

The Resideo 390686-1 Orifice Assembly is a precision-engineered replacement component designed specifically for LP gas pilot burners. With a 0.010-inch orifice diameter, this assembly ensures accurate fuel metering and flame stability in Honeywell Home pilot burners. It is a direct functional equivalent to part number 390686-1/U, maintaining strict adherence to OEM pressure and flow requirements. This LP gas orifice is essential for maintaining the correct pilot flame pattern and preventing carbon buildup or thermocouple failure. Field technicians will find this assembly compatible with several widely used intermittent pilot and standing pilot systems, providing a reliable seal and consistent performance in demanding residential and commercial heating environments. By utilizing the correct pilot burner orifice size, contractors can ensure optimal ignition reliability and prevent nuisance lockouts in high-efficiency gas furnaces and boilers.

Key Technical Benefits

• Compatible with Q314, Q345, Q3450, Q3451, and Q3452 Series pilot burners.
• Precise 0.010" diameter porting optimized for Liquid Propane (LP) applications.
• Direct cross-reference for Honeywell 390686-1 and 390686-1/U specifications.
• Durable construction prevents orifice clogging and maintains thermal efficiency.
• Simplifies pilot burner repair by ensuring consistent gas flow rates.

Common Questions

Can this orifice be used for Natural Gas conversions?
No, this 0.010" orifice is specifically sized and calibrated for the high-pressure characteristics of LP gas. Using it with Natural Gas will result in an inadequate pilot flame and system ignition failure.

Which Resideo pilot burners is the 390686-1 compatible with?
This assembly is engineered for use with the Q314, Q345, and the integrated SmartValve pilot series including the Q3450, Q3451, and Q3452.

Is there a difference between the 390686-1 and the 390686-1/U?
There is no functional or technical difference. The "U" suffix typically denotes "Universal" or retail packaging, but the technical specifications and fitment remain identical.

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.