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This genuine OEM Goodman 20201902 condensate drain hose is a 23-inch flexible tube engineered for the Goodman WGFM195045S3BAB high-efficiency modulating gas furnace. In a 95%+ AFUE condensing furnace, combustion produces acidic condensate that must be routed away from the heat exchanger and secondary coil. This factory-spec hose carries that moisture to the drain trap and pan reliably, preventing pooling, freeze-ups, and pressure-switch faults that trigger nuisance lockouts.
This is a true Goodman OEM part, molded to the exact length and diameter of the original so it seats on the factory drain ports without leaks. Generic universal hoses often require cutting, splicing, or clamps that can loosen over time and drip acidic condensate onto sheet metal. Choosing OEM protects your furnace warranty and guarantees a drip-free, first-time fit.
Easy (DIY-friendly). Power down the furnace at the switch, slide the old hose off the barbed fitting, and press the replacement into place — typically a 10-minute job with no special tools. Confirm the trap is primed and check for leaks on first firing.