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The Goodman 20201901 is a genuine OEM condensate drain hose tube built for the WGFM195090S4CAC 95% AFUE modulating gas furnace and related Goodman/Amana high-efficiency platforms. This heavier drain tube handles condensate routing between the collector box, drain trap, and inducer on condensing furnaces, keeping acidic moisture away from critical components and maintaining proper draft.
Because it is factory-molded to the furnace's exact port spacing and bend radius, the OEM 20201901 seats securely without adapters. Generic bulk hose can collapse under heat, sag, or trap water — leading to nuisance pressure-switch lockouts. The OEM part restores the original, engineered condensate path.
Easy (DIY-friendly). Shut off power, release the old tube from its fittings and clips, install the replacement, and verify free drainage. About 15 minutes with basic hand tools.