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The Goodman 20201902 is a genuine OEM 23-inch condensate drain hose tube for the GKS90904CXAC gas furnace and compatible Goodman/Amana high-efficiency models. Cut to a factory length of 23 inches, it bridges the drain connection to the trap or secondary fitting without the guesswork of trimming universal tubing. Proper length and slope are essential for gravity drainage — too short and it won't reach; too long and it sags and traps water, which can trigger a blocked-condensate lockout.
The 20201902 arrives at the exact 23-inch length and bore the furnace was designed around, so it installs with no cutting and seals correctly on both ends. Generic tubing must be measured, cut, and often clamped, introducing failure points. For a precise, leak-free repair on the GKS90904CXAC, the OEM pre-cut hose is the reliable choice.
Easy (1/5). This is a direct swap needing no tools. Power down the unit, pull the old hose from its barbs, slide the 23-inch replacement into place, and confirm both connections are fully seated with proper downward slope. Most homeowners finish in 10–15 minutes.