Resideo 390686-15 Orifice

The Resideo 390686-15 Orifice is a precision-engineered 0.009" pilot orifice designed for reliable ignition performance in high-efficiency gas-fired systems. This component, which is statistically identical to the 390686-15/U model, serves as a critical metering device within Honeywell pilot burner assemblies. As a veteran technician knows, maintaining the correct pilot flame stability requires exact orifice sizing to ensure proper BTU input and prevent intermittent pilot lockout. Fabricated from high-grade brass to resist thermal degradation and corrosion, this 0.009-inch gas orifice is compatible with various Q314, Q345, and Q348 pilot burners. When diagnosing standing pilot or intermittent pilot ignition (IPI) issues, replacing a clogged or worn orifice with this OEM Resideo replacement part ensures the system meets original manufacturer specifications for gas pressure regulation and combustion safety. Proper installation ensures a concentrated flame pattern for rapid thermocouple or flame sensor heating.

• Precision Metering: The exact 0.009" aperture ensures consistent gas flow for stable pilot operation in residential and commercial applications.
• OEM Compatibility: Fully interchangeable with 390686-15/U, ensuring a seamless fit in Honeywell pilot burner housings without field modifications.
• Durable Construction: Built to withstand high-temperature environments near the burner head, preventing orifice deformation over time.
• System Reliability: Reduces call-backs related to "no heat" complaints by resolving gas delivery issues at the pilot assembly.

What gas type is the 390686-15 orifice designed for?
This specific 0.009" orifice is typically utilized in Natural Gas applications; always verify your specific burner assembly's stamping and the manifold pressure before installation.

Can this replace a damaged orifice in a Q314 pilot burner?
Yes, the 390686-15 is a standard replacement component for the Q314 series, provided the technical specifications call for a 0.009" flow rate.

How do I resolve a weak pilot flame when using this part?
If the pilot flame is insufficient after installing a new orifice, check the pilot gas line for obstructions and verify that the pilot adjustment screw on the gas valve is set correctly for the required supply pressure.

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.