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The Goodman 22309501 is a genuine OEM flue pipe designed for the GKS90703BXAG high-efficiency gas furnace. This internal venting component carries combustion byproducts from the heat exchanger and inducer assembly toward the exhaust termination. Because a condensing furnace's flue path runs cooler and carries acidic moisture, the correct OEM flue pipe is built to resist corrosion and maintain a sealed, safe combustion path — critical for both efficiency and carbon-monoxide safety.
Flue and venting parts are safety-critical. The OEM 22309501 is dimensioned to the exact port and clearance specs of the GKS90 cabinet, ensuring a gas-tight seal at every joint. Improvised or generic substitutes can leak combustion gases and void your warranty. Always use the factory part on any venting connection.
Moderate — 30–45 minutes and should be verified by a qualified HVAC technician. Requires shutting off gas and power, disconnecting the existing flue section, seating and sealing the replacement, and confirming no combustion-gas leaks before returning the unit to service.