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The 20201902 is a genuine OEM 23-inch condensate drain hose tube for the Goodman GCH90905DXAA high-efficiency gas furnace. Cut to the factory length, this flexible drain line carries acidic condensate between the collector box, drain trap, and pressure-switch ports along the correct routing path. Aged tubing that has hardened, cracked, or clogged is a frequent cause of water leaks and pressure-switch nuisance faults; installing the exact-length OEM tube restores clean, reliable drainage.
The OEM Goodman tube arrives pre-cut to 23 inches with the correct inside diameter, so it reaches its fittings and seals without guesswork. Generic bulk hose must be measured and cut in the field, inviting length and ID errors — for a clean, leak-free repair, the direct-fit OEM part is best.
Easy (1/5). Pull the old hose off the barbed fittings, route the new 23-inch tube the same way, and reseat any clamps. Under 15 minutes. Keep the run sloped to drain so no water is trapped.