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The Goodman 20201902 is the 23-inch factory condensate drain hose tube for the GMV951155DXBB 96% AFUE two-stage gas furnace. Its pre-cut 23" length matches the original drain routing from the collector box to the trap, so there is no guesswork or trimming. A worn or split drain tube can back up condensate and trip the pressure switch, shutting the furnace down on cold nights.
OEM vs. Generic: The genuine 20201902 is cut and formed to the exact 23" run your furnace expects, with the correct barb diameter for a snug, leak-free fit. Generic bulk tubing forces you to measure, cut, and clamp — and the wrong wall thickness can kink at the bends. For dependable drainage, install the OEM tube.
Install difficulty: Easy (1/5). Remove the old tube from its fittings, route the replacement along the same path, and press it onto the barbs. Hand tools only. Turn off power and gas first.