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The Goodman 20201901 condensate drain hose tube is a genuine OEM component built for the GMH950904CXAB high-efficiency condensing gas furnace and related Goodman/Amana 90%+ AFUE models. It carries corrosive condensate from the collector box and secondary heat exchanger to the drain system, protecting internal components from moisture damage and blockages.
Choosing the OEM Goodman 20201901 guarantees the correct pre-formed geometry and fitting diameters for the GMH950904CXAB, so condensate flows freely with no pooling. Generic replacements require field modification and may not hold their shape under heat, leading to sags that trap water and trip the pressure switch. The OEM part avoids nuisance lockouts and callbacks.
Expect a 20–30 minute job. Shut off electrical power to the furnace, disconnect the existing tube at both clamp points, install the 20201901 with the factory bends oriented as shown in your manual, and verify a continuous downhill path to the trap. Test for leaks before restoring power. No specialized tooling is needed for this straightforward maintenance repair.