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The Goodman 20201901 is a factory-original condensate drain hose tube engineered for the AMS950904CXA gas furnace and compatible Goodman/Amana 90%+ AFUE models. This flexible tube routes condensate away from the secondary heat exchanger and collector box to the drain trap, keeping the burner assembly dry and preventing nuisance lockouts caused by water intrusion or blocked drainage.
The genuine OEM 20201901 is molded to the exact length, bend radius, and fitting diameter of the AMS950904CXA drain system, so it seats without kinking or leaks. Generic universal tubing often requires trimming and can collapse under heat, leading to slow drains and moisture faults. For a furnace condensate path, factory fit matters.
Easy (1/5). No special tools required — disconnect power, slip the tube onto the drain fitting, secure the clamp, and verify flow. Most DIY-capable homeowners complete this in under 15 minutes.