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The Goodman 20201901 is a genuine OEM condensate drain hose assembly for the WGFM295070V4CAA 96% AFUE modulating gas furnace. This heavier drain tube carries acidic condensate from the collector box and secondary heat exchanger to the furnace's drain outlet. Because condensing furnaces run wet by design, a properly fitted OEM drain line keeps the collector box clear and prevents condensate backup that can trigger pressure-switch faults or spill water into the cabinet.
The OEM Goodman assembly matches the factory routing, barb sizes, and length exactly, so it seals on the first try. A generic substitute may require trimming and additional clamps and risks a mismatched diameter that leaks or restricts flow.
Easy (2/5). Disconnect power, remove the old hose from its fittings, seat the replacement on both ends, and secure with clamps. Confirm free drainage and check for leaks on startup. Roughly a 15-minute repair.