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The Goodman 20201802 is a genuine OEM condensate drain hose tube engineered for the WGFD293070V4CAA gas furnace and compatible Goodman/Amana high-efficiency models. It routes condensate away from the secondary heat exchanger and drain pan, preventing water pooling, nuisance lockouts, and corrosion inside the furnace cabinet.
The OEM 20201802 tube is molded to the exact bend radius and fitting diameters of the WGFD293070V4CAA drain assembly, so it seats without leaks or kinks. Generic aftermarket tubing is a lower-cost option but may require trimming and can leak at the pan and trap connections. For a factory-correct seal, the OEM part is recommended.
Easy (1/5) — Typically a slip-fit connection secured with a clamp. Basic hand tools; 5–10 minutes for most DIYers. Always shut off power and gas before servicing.