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The Goodman 20201901 is a genuine OEM condensate drain hose tube for the WFD195045S3BAA high-efficiency gas furnace and compatible Goodman/Amana models. This molded hose manages condensate flow within the furnace's drainage system, carrying acidic water from the secondary heat exchanger and collector box toward the trap and drain outlet. Because it handles corrosive condensate under repeated heating and cooling cycles, the factory routing and durometer matter — a deteriorated or mis-sized hose causes leaks, pressure-switch faults, and water damage inside the cabinet.
This OEM hose is formed to the exact bends, length, and barb diameters of the WFD195045S3BAA drainage layout. Generic straight tubing rarely follows the required routing, can chafe or kink against the cabinet, and may not seat tightly on OEM connections. Genuine Goodman parts protect your warranty and eliminate guesswork.
Plan on 15–20 minutes. De-energize the furnace, release the retaining clips or clamps, remove the old hose, and route the new 20201901 following the original path. Seat each end fully, verify a continuous downhill drain, and test for leaks before returning the furnace to service.