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The Goodman 20201901 is a genuine OEM condensate drain hose tube built for the WGFM195115S5DAC condensing gas furnace. It carries corrosive condensate from the secondary heat exchanger and inducer to the drain trap along the factory-specified path, protecting internal components from moisture and preventing overflow that can trip the safety pressure switch.
The OEM 20201901 is pre-formed to the exact length and bend geometry Goodman validated for this furnace, so it clears surrounding components and seats on every fitting without stretching or kinking. Generic replacements often require trimming and guesswork, and a poor fit here can cause slow drainage, water pooling, and repeat service calls. Genuine tubing avoids those headaches.
Easy (1/5). Turn off power to the furnace, remove the failed tube from its connections, and press the new tube fully onto each fitting. Confirm the routing matches the original, prime the trap, and watch for leaks during the first condensate cycle. Expect about 10-15 minutes with no special tools.