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This genuine OEM Goodman 20201802 drain hose tube is a factory-molded condensate line for the Amana AMH950703BXAB 96% AFUE, 70,000 BTU gas furnace and related Goodman/Amana high-efficiency models. In a condensing furnace, the secondary heat exchanger and collector box produce acidic condensate that must be routed cleanly to the drain trap. This pre-formed tube is bent to the exact geometry of the cabinet so it clears internal components without kinking.
Generic bulk tubing rarely holds the correct bend radius and can collapse or route incorrectly, leading to condensate backup, control-board pressure faults, and water damage. The OEM 20201802 is shaped and sized for this cabinet, ensuring proper slope and a leak-free connection every time.
Difficulty: Easy (1/5). With the furnace powered off, release the hose clamps, remove the old tube, and press the new tube onto the same fittings. Re-secure clamps and confirm slope toward the trap. Replacement takes about 5–10 minutes. Inspect and clean the trap while access is open.
Exact-fit OEM replacement from National HVAC Parts.