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The genuine Goodman 20201902 is the factory 23-inch condensate drain hose for the GME951005DXAB high-efficiency gas furnace. This longer run connects the drain system to the field-side condensate outlet or pump, carrying corrosive condensate away from the cabinet. Its high-temperature, chemical-resistant material outlasts generic vinyl tubing that hardens and cracks after exposure to acidic furnace condensate.
Because this is a length-specific part, using a shorter generic hose forces splices that leak, while an over-long one sags and traps water. The OEM 20201902 is cut and finished to the correct 23-inch length with the proper inside diameter and barb fit, so it seats securely on the first try and drains with a clean downhill slope.
Very Easy (1/5). Under 10 minutes: shut off power, remove the old hose from both fittings, press the new 20201902 fully onto each barb, and verify the routing slopes continuously downward with no kinks. Flush with water to confirm a leak-free path before restarting.