Burnham Boiler 822643 Orifice

The Burnham Boiler 822643 Orifice is a precision-machined OEM replacement part engineered for critical gas flow regulation in commercial and residential hydronic heating systems. Specifically identified as a Conbraco 68-122-16 grooved orifice with a #45 drill size (color-coded pink), this component is vital for maintaining the correct stoichiometric ratio in gas-fired boilers. As a veteran technician knows, using the correct burner orifice is non-negotiable for preventing incomplete combustion, soot buildup, or manifold pressure irregularities. This natural gas orifice ensures consistent BTU input, which is essential for the high-efficiency performance of compatible Burnham series units. Whether you are performing a seasonal tune-up or responding to a combustion failure, this brass boiler orifice provides the exact dimensions required to match factory specifications and maintain heating system reliability without the risks associated with generic alternatives.

• Direct OEM Match: Designed specifically as the 822643 Burnham orifice to ensure seamless threading and seating into the burner manifold.
• Precision Metering: The #45 drill size provides accurate gas volume control, critical for reaching rated thermal output.
• Durable Construction: High-grade brass resists thermal stress and corrosion, preserving the integrity of the gas flow regulation over time.
• Compliance Ready: Facilitates meeting local mechanical codes by utilizing authentic Burnham replacement parts during documented repairs.

Is this orifice compatible with Liquid Propane (LP) systems?
No, the 822643 orifice is typically sized for natural gas applications. Converting a system to LP requires total recalculation of the orifice bore and potentially different part numbers to accommodate higher fuel density.

How do I verify if this fits my specific Burnham model?
Compatibility is model and altitude dependent. Always cross-reference the part number 822643 against the technical data plate or parts list for your specific boiler series to ensure the orifice drill size matches the original configuration.

What are the signs of a failing or clogged burner orifice?
Common indicators include "lazy" yellow flames instead of a crisp blue cone, localized soot accumulation, or uneven heat distribution across the heat exchanger sections, often caused by debris or oxidation within the precision-drilled bore.

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.