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The Goodman 20201901 is a genuine OEM condensate drain hose/tube assembly for AMVC950905CXAB modulating 95% AFUE condensing furnaces. This larger drain component carries acidic secondary-heat-exchanger condensate through the cabinet to the drain trap. Using the factory-specified hose preserves the engineered routing and prevents the airflow and water-management problems that off-spec tubing can introduce.
The OEM 20201901 arrives pre-formed to the exact bore and length the furnace requires. Generic substitutes often differ in diameter or flexibility, which can create slow drips, trapped-water blockages, or fittings that separate under load. For a condensing furnace's drain system, the OEM part is the reliable choice.
Easy — about 15 minutes. Cut power, remove the old hose from its barbed fittings, and firmly press the replacement onto both ends. Verify a continuous downhill slope to the trap and check for leaks on the first heat cycle.