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The Goodman 20201901 Condensate Drain Hose Tube is a genuine OEM replacement part engineered for GCH90904CXAA high-efficiency gas furnaces. This flexible drain hose routes condensate away from the secondary heat exchanger and collector box to the drain trap, preventing water backup, overflow, and nuisance pressure-switch lockouts. When the original hose becomes brittle, kinked, or clogged, replacing it with the correct factory tube restores proper drainage and protects surrounding components from moisture damage.
Choosing the genuine OEM 20201901 guarantees the exact length, bend radius, and barbed connection diameters designed for your furnace. Aftermarket universal hose can be trimmed to fit but often lacks the correct pre-formed angles, leading to kinks and slow drainage. For condensing furnaces where drainage is critical to safe operation, OEM is the reliable choice.
Easy (1/5). Most homeowners and technicians can swap this hose in 10–15 minutes with basic hand tools. Power down the furnace, disconnect the old hose from the collector box and trap, seat the new tube on the barbed fittings, and confirm a downhill run to the drain. Always verify the condensate trap is clear before restoring power.
Compatibility note: Confirm your model tag reads GCH90904CXAA before ordering. Contact info@nationalhvacparts.com if you need help matching this part.