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This genuine OEM Goodman 20201902 is a 23-inch molded condensate drain hose tube for the Amana AMH950703BXAB 96% AFUE, 70,000 BTU gas furnace and related Goodman/Amana high-efficiency models. Cut and formed to a precise 23" length, it routes acidic condensate from the furnace's internal drain path to the trap or drain fitting without excess slack that could sag and trap water.
Length matters. A generic tube cut too long sags and creates low spots where condensate collects and freezes or backs up; too short and it strains the connections. The OEM 20201902 is the factory-specified 23" run with the correct diameter and chemical resistance, ensuring proper slope and a secure, leak-free fit.
Difficulty: Easy (1/5). Turn off power, release the clamps, remove the old 23" tube, and install the replacement on the same fittings. Verify continuous downward slope to the trap and re-secure. About 5–10 minutes. Flush the trap and drain line while you have access.
Exact-length OEM replacement from National HVAC Parts.