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The Goodman 20201802 is a genuine OEM condensate drain hose tube for the AMH950905DXAE high-efficiency furnace. It carries acidic condensate between the secondary heat exchanger, collector box, drain trap, and pressure-switch ports. Because it is pre-cut and pre-formed to the factory length and bend, it routes cleanly inside the cabinet without kinking or restricting flow.
Cutting generic tubing to length seems easy, but the wrong inner diameter or a slightly long piece can kink at the cabinet bends and cause water backups that trip the pressure switch. The factory 20201802 is sized and shaped to drop in without guesswork, ensuring reliable condensate flow.
Easy (DIY-friendly) — a 5–10 minute swap. Power down, pull the old hose off its barbed fittings, press the new one on, and confirm a snug, leak-free connection. No tools required.