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The Goodman 22309501 is the OEM flue vent pipe for the GKS90703BXAA gas furnace. It channels combustion byproducts from the heat exchanger and inducer assembly to the vent outlet, and it is dimensioned to the exact diameter and length required for correct draft and clearance inside the GKS90 cabinet. Proper venting hardware is a safety-critical component — a warped, corroded, or ill-fitting flue can leak combustion gases.
The OEM Goodman flue pipe matches factory diameter, length, and connection points for a code-compliant, leak-tight fit. Generic substitutes may require modification and can compromise draft or clearances. For a combustion-venting part, we strongly recommend OEM — do not improvise on flue components.
Moderate (3 of 5). Requires shutting off gas and power, disconnecting the existing flue, and confirming all joints are sealed and clearances are correct. Because this handles combustion gases, we recommend a qualified HVAC technician verify the installation.