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This genuine OEM Goodman 20201902 is a pre-cut 23-inch condensate drain hose tube for the GCV90905DXBB 96% AFUE gas furnace. The 23" length is specified to reach from the collector box / inducer drain to the trap assembly in a specific cabinet orientation, so you get the correct run without cutting or splicing. Replacing a hardened or split tube restores proper condensate flow and prevents water backup that triggers pressure-switch lockouts.
Buying the OEM 23" tube means the length and fitting diameters are already correct — no measuring, cutting, or guesswork. Generic hose forces you to size it yourself and often seals unreliably at the barbs. For consistent draft and a leak-free condensate path, the factory-cut OEM part is the safer install.
Rated Easy — slip the pre-cut tube onto the fittings and secure the clamps with a nut driver. Always de-energize the furnace and shut off the gas first. Clear the trap and drain line while accessible. Consult a licensed HVAC tech if you're unsure of the routing.