The Williams P090554 Orifice is a critical engineering component designed for precise fuel metering in Williams furnace gas conversion and high-altitude applications. For contractors managing HVAC high altitude kits, this brass burner orifice is essential for maintaining correct manifold pressure and combustion stability. Specifically utilized in liquid propane (LPG) systems, the P090554 ensures that units like the Williams Monterey and Forsaire series operate within safe thermal output parameters when installed at elevations ranging from 2,001 to 8,000 feet, depending on the specific appliance BTU rating. Proper furnace orifice replacement is mandatory to prevent soot accumulation or overheat conditions in thin-air environments.

When executing a wall furnace high altitude adjustment, technicians must verify the drill size and flow coefficient (Cv) match the manufacturer’s manifold specifications. This OEM gas orifice is precision-machined to provide a consistent discharge coefficient, preventing the common "popping" or delayed ignition issues associated with generic parts. Whether you are performing a propane conversion for Williams furnaces or a routine sea-level maintenance check, the P090554 provides the exact internal tolerances required for factory-spec thermal efficiency.

Key Benefits

• High-Altitude Optimization: Specifically calibrated for elevated installations to ensure clean combustion and prevent carbon monoxide buildup.
• Gas Type Compatibility: Engineered for liquid propane (LPG) applications in Williams Top-Vent and Direct-Vent gravity furnaces.
• OEM Precision: Guaranteed Williams P090554 manufacturing tolerances eliminate the variability found in aftermarket drill-outs.
• Thermal Efficiency: Maintains the correct BTU input for 25,000 to 55,000 BTU models across various altitudes.

Common Questions

Is this orifice for natural gas or propane?
The P090554 is primarily used in Williams propane (LPG) configurations, often as part of a high-altitude conversion for Monterey and Forsaire models.

What elevation is the P090554 rated for?
In many 30,000 BTU direct-vent gravity models, this orifice is specified for elevations between 6,001 and 8,000 feet, while in other 25,000 BTU models, it is used starting at 2,001 feet. Always cross-reference your specific model's high-altitude matrix.

Can I use this for any brand of wall furnace?
No, this is a model-specific Williams furnace part. Using incorrect orifices can lead to dangerous over-firing or inefficient combustion.

Notes

Non Cancelable / Non Returnable

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.