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The Goodman 20201901 Drain Hose Tube is a genuine OEM condensate hose assembly for the GKS90703BXAC high-efficiency gas furnace and compatible Goodman/Amana models. This heavier drain tube handles condensate routing between the collector box, drain trap, and cabinet outlet in a 90%+ AFUE furnace. Its pre-formed shape and length are matched to the factory drainage path so condensate flows without kinks or back-ups. Replace it when the original becomes brittle, cracked, or clogged with scale — common sources of leaks and pressure-switch no-heat faults.
The OEM Goodman hose is pre-formed to the exact factory routing and barb sizing, ensuring a leak-free connection without trimming. Generic tubing can pinch or pop off under condensate flow. For dependable drainage on a condensing furnace, the genuine OEM tube is recommended.
Difficulty: Easy (1/5). Power down the furnace, remove the old hose from its barbed fittings, and press the replacement onto the same connections, reinstalling any clamps. About 5–10 minutes. Confirm free condensate flow and no leaks after running a heat cycle.