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The Goodman 20201902 is a genuine OEM 23-inch condensate drain hose tube engineered for the GKS90453BXAB gas furnace and other compatible Goodman/Amana high-efficiency models. It routes acidic condensate away from the heat exchanger and inducer assembly to the drain trap, preventing backups, corrosion, and nuisance pressure-switch lockouts.
This is a factory OEM Goodman part, cut and formed to the exact length and diameter your furnace expects — no trimming, kinking, or adapter guesswork. Generic bulk tubing is cheaper up front but often mismatches the barb fittings, leaks at the connections, and can degrade faster when exposed to acidic condensate. For a leak-free, warranty-safe repair, OEM is the reliable choice.
Easy (1/5). Power down the furnace, slide the old hose off the drain fittings, and press the new hose into place. Most homeowners complete this in under 10 minutes with no special tools.