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The Goodman 22309501 is a genuine OEM flue vent pipe for GKS90703BXAF and compatible Goodman/Amana gas furnaces. It carries combustion byproducts from the inducer/collector assembly to the vent system, sealing the exhaust path so flue gases exit safely and the pressure switch sees the correct draft. A cracked, corroded, or ill-fitting flue pipe can cause pressure-switch faults, poor draft, and unsafe spillage of combustion products.
The OEM flue pipe is formed to the exact length, diameter, and connection geometry of the GKS90703BXAF venting layout, so gaskets and clamps seal on the first try. Because this component handles combustion exhaust, fit and material integrity are safety-critical — generic substitutes that don't seal properly risk flue-gas leakage. We strongly recommend the genuine Goodman part here.
Moderate (3 of 5). Plan 30–60 minutes. Shut off gas and power, remove the venting connections and any clamps or gaskets, fit the replacement pipe, and reseal every joint per spec. Because this is a combustion-venting component, a combustion-analyzer check is recommended after install — hire a licensed HVAC technician if you are not certified.