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The Goodman 20201901 is the OEM condensate drain hose tube for the GME950805CXAB high-efficiency gas furnace. It carries acidic condensate from the secondary heat exchanger and collector box to the drain trap and out of the furnace cabinet. Because condensate is mildly acidic, factory hoses are molded from a chemical- and heat-resistant compound and pre-formed to the correct length and bend radius so the run drains fully without kinks or low spots that would pool water and trip the pressure switch.
Generic vinyl tubing is easy to substitute but often the wrong diameter or durometer, leading to slip-off leaks and sagging that blocks drainage. The genuine Goodman 20201901 is pre-formed to the exact routing of the GME950805CXAB drain system, seating tightly on the collector-box and trap fittings for a leak-free connection that preserves your warranty.
Easy (1 of 5). Power down the furnace, pull the old hose from both fittings, seat the new tube, and secure any clamps. Prime the trap and check for leaks on restart. Typically a 10–15 minute job with basic tools.