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The Goodman 20201902 is a genuine OEM 23-inch condensate drain hose tube engineered for AMH950904CXAC high-efficiency furnaces. This flexible drain line channels condensate away from the secondary heat exchanger and drain pan, preventing water backup, overflow, and the nuisance lockouts that follow a clogged or cracked drain path. Using the correct factory length and inside diameter ensures a leak-free slip fit at every connection point.
The genuine Goodman OEM hose is cut to the exact factory length and durometer, so it seats fully on the drain fittings without kinking. Generic universal tubing often requires trimming and can collapse under vacuum, leading to slow drainage and pressure-switch faults. For a fit-and-forget repair, the OEM part is the safe choice.
A basic DIY repair — typically 10–15 minutes. Power down the furnace, disconnect the old hose from the drain pan and outlet, slide the new tube on, and secure any clamps. No special tools required.