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Read our privacy policyThe Williams 9A331 is a high altitude conversion kit for the Williams 2509822 and 2509622A furnace. The kit includes all adapters and orifices needed for high altitude conversion.
Product Includes
Orifice for installation at 2,000 to 4,000 feet.
Orifice for installation at 4,000 to 6,000 feet.
Orifice for installation at 6,000 to 8,000 feet.
1-Year Limited Parts Warranty