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The Goodman 20201902 23-inch Condensate Drain Hose Tube is a genuine OEM replacement designed for the Goodman GKS90904CXAH high-efficiency gas furnace and related GKS9-series units. This factory-length 23-inch tube carries condensate from the collector box or secondary heat exchanger to the drain trap. Because condensing furnaces continuously produce mildly acidic water, drain hoses harden and split over time — a failing tube causes leaks, drain blockages, and nuisance pressure-switch lockouts. Installing the correct OEM length ensures proper slope and unobstructed flow.
The genuine Goodman 20201902 arrives pre-cut to the exact 23-inch factory specification with the correct inner diameter for a leak-free press fit. Generic tubing must be measured and cut by hand and often uses lower-grade material that stiffens quickly against condensate. OEM eliminates fitment guesswork and lasts longer.
Easy (1/5) — A quick 5–10 minute replacement. De-energize the furnace, remove the old hose, route the new 23-inch tube with a continuous downward slope, and verify drainage. No special tools needed. Refer to your Goodman manual and local codes.