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The Goodman 4053501S is a genuine OEM chimney (flue) collar designed for the GMPH050-3 gas furnace. The collar connects the furnace draft hood / flue outlet to the vent pipe, providing a secure, properly sized transition for combustion gases. A corroded or missing collar can cause vent leaks and improper draft — replacing it with the factory part keeps the flue connection safe and code-compliant.
The OEM Goodman collar is sized to the exact flue diameter and mounting flange of the GMPH050-3, ensuring a tight, leak-free seal. Generic collars may not match the outlet diameter or hole pattern, risking flue-gas leakage. For a combustion-venting part, exact fit matters for safety.
Easy — Usually under 20 minutes. Remove the old collar screws, seat the new collar, fasten, and reconnect the vent pipe. A nut driver and high-temp sealant are all that's typically needed.
Verify proper draft after installation. Disconnect power and shut off gas before servicing.