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The Goodman 20201902 is a genuine 23-inch condensate drain hose tube engineered for the GKS90904CXAB gas furnace. This flexible drain line carries condensate away from the secondary heat exchanger and collector box to the drain trap, keeping your high-efficiency furnace running clean and dry. Over time, drain hoses can crack, kink, or clog with sediment and biofilm — leading to water leaks, tripped float switches, and nuisance shutdowns. Replacing the hose with the exact OEM part restores proper drainage and protects surrounding components from water damage.
The OEM 20201902 is cut and formed to the precise length and bend radius of your furnace, ensuring a leak-free connection at both fittings. Generic universal hose may require trimming and can loosen at slip connections, increasing the risk of condensate leaks. For a factory-correct fit and long service life, the OEM part is the recommended choice.
Easy — A typical replacement takes 10–15 minutes with basic hand tools. Power down the furnace, disconnect the old hose from the collector box and drain trap, route the new hose, and secure the connections. No special tools or refrigerant handling required.