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The Goodman 22309501 is a factory OEM flue pipe / vent connector engineered for the GKS90905DXAF 90%+ AFUE gas furnace. This component routes combustion byproducts from the heat exchanger and inducer assembly to the venting system, making it a critical safety part. Because it is a genuine Goodman replacement, it matches the original diameter, bend angle, and gasket seat exactly — no field modification or adapters required.
This is the genuine Goodman OEM part. Generic flue components often vary in wall thickness and flange geometry, which can cause vent leaks or failed combustion draft. For a sealed-combustion 90% furnace, we strongly recommend the OEM part to preserve the factory venting integrity and pass inspection.
Moderate (2/5). Requires shutting off gas and power, disconnecting the existing flue section, and re-sealing joints per code. Most experienced DIYers can complete it in under 30 minutes; if you are unsure about combustion venting, use a licensed HVAC technician.
Always confirm the part number against your furnace nameplate before ordering.