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The Goodman 22309501 is an OEM internal flue vent pipe designed for the AMV91155DXAB high-efficiency condensing gas furnace. It carries combustion exhaust gases from the secondary heat exchanger to the induced-draft blower and out through the venting system. Because condensing furnaces run cooler, wetter exhaust, the flue pipe must resist acidic condensate and maintain a precise fit to preserve draft pressure and pass the pressure-switch safety checks.
The genuine 22309501 matches the factory diameter, length, and connection geometry so the induced-draft pressure switch reads correctly and the furnace fires reliably. Generic pipe of the wrong diameter or wall thickness can alter draft, trip pressure-switch faults, or degrade under acidic condensate. For a sealed-combustion appliance, the OEM part protects both performance and safety.
Moderate (3/5). Requires partial disassembly of the burner/blower compartment and careful reseating of gaskets and clamps to maintain an airtight seal. Best handled by an HVAC technician; a confident DIYer should verify all seals and run a combustion/draft check afterward. Shut off power and gas first.