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The Goodman 20201901 is an OEM condensate drain hose tube built for the WGFM295090V5DAA modulating gas furnace and related Goodman/Amana condensing platforms. It carries condensate from the collector box and secondary heat exchanger to the drain trap, a critical path on 90%+ AFUE furnaces where standing water can trigger pressure-switch faults and premature corrosion. This is a longer, higher-capacity run within the drain assembly, so exact OEM sizing matters.
Genuine Goodman tubing matches the factory inside diameter and flexibility so it clears cabinet obstructions without pinching. Generic substitutes frequently kink at bends or fail to seal on the barb fittings, causing intermittent drips and heat-exchanger corrosion over time. The OEM 20201901 is the reliable choice for this drain leg.
Easy — DIY friendly (approx. 20 minutes). De-energize the furnace, detach the worn hose from both fittings, route the new 20201901 exactly as original, and reseat the clamps. Confirm continuous downhill fall to the trap and run a wet test to check for leaks before restoring power.