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The Goodman 20201901 Condensate Drain Hose Tube is a genuine OEM replacement part engineered for the Goodman GKS90904CXAH 90%+ AFUE gas furnace and compatible GKS9-series models. On high-efficiency condensing furnaces, the drain hose routes acidic condensate away from the secondary heat exchanger and collector box to the drain trap. A cracked, brittle, or clogged drain tube is one of the most common causes of water leaks, blocked-drain lockouts, and pressure-switch faults — replacing it restores proper drainage and protects surrounding components from corrosion.
This is the genuine Goodman OEM tube, cut and formed to the exact length and bend radius the factory specifies — no trimming, guesswork, or kinking. Generic bulk tubing may fit loosely, degrade faster against acidic condensate, or route incorrectly, leading to repeat leaks. For a reliable, lasting repair, OEM is the recommended choice.
Easy (1/5) — Typically a 5–10 minute swap. Power down the furnace, disconnect the old hose at each fitting, seat the new tube, and confirm a clear drain path. No special tools required. Always follow your Goodman installation manual and local codes.