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The Goodman 20201802 Drain Hose Tube is a genuine OEM condensate routing component for the WGFM195090S5DAB high-efficiency gas furnace. On 95%+ AFUE furnaces, the secondary heat exchanger and collector box produce acidic condensate that must be carried away cleanly. This factory-molded hose is shaped to fit the exact port geometry and clearances of the Goodman cabinet, ensuring a leak-free, kink-free path to the drain trap.
OEM vs. Generic: Generic bulk hose can be forced into place, but the pre-formed bends on the OEM 20201802 prevent the sags and kinks that trap condensate and cause pressure-switch faults or water leaks. Using the correct molded part protects against nuisance lockouts and cabinet corrosion.
Install Difficulty: Easy. Power down the furnace, slide the old hose off its barbed fittings, and press the replacement onto the same ports — usually under 10 minutes with no tools. Confirm the routing slopes downward to the trap and pour water through to verify free flow before restoring power. An ideal low-cost preventive replacement during annual furnace service.