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The Goodman 22309501 Flue Pipe is the genuine OEM combustion-vent pipe used on GKS91155DXAC gas furnaces. It carries flue gases from the inducer assembly to the vent connection, and its exact diameter and length are critical for correct draft, pressure-switch operation, and safe removal of combustion byproducts. A corroded, cracked, or ill-fitting flue pipe can cause pressure-switch lockouts, poor combustion, and hazardous exhaust leakage.
Flue components are safety-critical, and the genuine Goodman pipe is manufactured to the precise dimensions and gasket seats your furnace requires. Generic or fabricated substitutes risk poor seals, improper draft, and code-compliance issues. For any part in the combustion-exhaust path, OEM is strongly recommended.
Moderate (3 of 5). Turn off gas and electrical power, remove the existing flue pipe by loosening its clamps or gaskets, seat the new pipe, and re-secure all connections. Always inspect gaskets and confirm a tight seal. Because this affects combustion venting, we recommend a qualified HVAC technician verify draft and check for flue-gas leaks after installation.