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The Goodman 20201802 is a factory drain hose tube used in the condensate management system of AMVC950905CXAD 96% AFUE variable-speed gas furnaces. In high-efficiency condensing furnaces, the secondary heat exchanger produces acidic condensate that must be routed cleanly to the drain trap and collector box. A cracked, brittle, or disconnected drain tube leads to water leaks, condensate spillage, and nuisance pressure-switch or lockout faults. This exact-fit OEM tube restores a leak-free path and correct routing geometry.
The genuine Goodman 20201802 is molded to the correct length, diameter, and bend radius for the AMVC9 cabinet, so it seats on the collector box and trap fittings without kinking. Generic hose can be trimmed to fit but often lacks the correct barb sizing and condensate-resistant compound, shortening service life. For a furnace expected to run 15+ years, the OEM tube is the safer long-term choice.
Difficulty: Easy (DIY-friendly). Power down the furnace, slip off the old tube, and press the new one onto the same fittings — no tools beyond pliers or a screwdriver for the clamps. Verify a clear downhill run to the trap and test for leaks before restoring power. Most homeowners complete this in under 15 minutes.