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The Goodman 20201901 is the OEM condensate drain hose tube engineered for the WGFM195070S4CAC gas furnace and compatible Goodman/Amana 95%+ AFUE models. It routes acidic condensate away from the secondary heat exchanger and inducer assembly, preventing overflow, water damage, and pressure-switch lockouts. As a high-efficiency furnace, this model produces significant condensate during operation, so a properly sealed drain path is essential to reliable heating.
This is a genuine Goodman OEM hose molded to the exact length, bend radius, and fitting diameter of the factory drain layout. Generic universal tubing often requires cutting, adapters, and extra clamps, and can kink or degrade against condensate acidity. The OEM part drops in without guesswork and keeps your warranty intact.
Easy (1/5). Power down the furnace, disconnect the old hose from the drain trap and collector fittings, slide on the replacement, and secure the clamps. Typically completed in 10–15 minutes with basic hand tools. Verify a clear, downward-sloping path to the drain after install.