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The 20201901 is a genuine OEM condensate drain hose assembly for the Goodman WGFM195090S5DAC 95% AFUE condensing furnace. This heavier drain tube handles the primary condensate run between the collector box, trap, and drain outlet, molded to the specific length and bends of this furnace cabinet so water clears reliably and connections stay sealed.
Because this hose is pre-formed to the furnace's internal geometry, the OEM part drops in without guesswork and won't kink or airlock. Generic tubing you cut yourself may sag, trap condensate, or pop off a barb under pressure — leading to water damage and pressure-switch lockouts. The factory hose is the dependable fit.
Shut off power to the furnace and note how the original hose routes. Remove it from its barbs, then press the new 20201901 fully onto each fitting following the same path with a continuous downward slope. Prime the trap and run a heating cycle to verify free, leak-free drainage.