Reznor 63003 Orifice

Maintain precise manifold pressure and combustion efficiency with the Reznor 63003 Burner Orifice, a critical OEM component engineered for specific gas-fired unit heaters. This 1.20 mm brass orifice plug is manufactured to strict tolerances to ensure a consistent fuel-to-air ratio, preventing the common issues of soot accumulation or delayed ignition in propane (LP) gas conversion applications. Designed specifically for compatibility with Reznor F-50 and F-75 models, this precision-drilled orifice is essential for service technicians performing routine maintenance or manifold adjustments.

When replacing a gas burner orifice, technicians must ensure the drill size matches the unit’s BTU rating and fuel type to avoid hazardous over-firing or inefficient under-firing. The high-grade brass construction provides superior corrosion resistance against fuel impurities, ensuring the heating system performance remains stable over long-term operation. Using the genuine Reznor 63003 replacement part guarantees that your HVAC gas heater operates according to the original manufacturer's specifications, maintaining the integrity of the heat exchanger and burner assembly.

• Precision Gas Metering: Features a factory-calibrated 1.20 mm opening for exact fuel flow regulation in Reznor propane unit heaters.
• OEM Compatibility: Direct replacement for Reznor 63003, ensuring seamless fitment in F-series burner manifolds.
• Durable Brass Design: Resists thermal cycling and chemical corrosion for reliable combustion system service life.
• Optimized Heat Output: Supports stable flame patterns and maximum thermal efficiency in commercial gas heaters.

What is the drill size for the Reznor 63003 orifice?
This orifice is factory-drilled to 1.20 mm, which is the standard specification for specific low-BTU propane applications in the Reznor F-series lineup.

Can I use this orifice for a natural gas conversion?
No, this 1.20 mm orifice is specifically sized for propane. Natural gas requires a larger orifice diameter to account for the difference in energy density and manifold pressure.

How do I know if my burner orifice needs replacement?
Technicians should inspect for debris blockage, physical damage from cross-threading, or signs of improper previous drilling which causes yellow tipping and inefficient combustion.

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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.