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The Goodman 20201901 Condensate Drain Hose Tube is a genuine OEM drainage component for the GKS91155DXAA gas furnace and related Goodman/Amana high-efficiency platforms. It carries acidic condensate from the furnace's collector box and inducer assembly to the drain, protecting internal components from corrosion and preventing water backup that can trip the pressure switch.
Because condensate from a 90%+ furnace is mildly acidic, hose material and fit matter. The OEM 20201901 uses factory-grade tubing sized to Goodman's exact fittings, so it seats securely and resists degradation over years of service. Cheaper generic hose can crack or loosen, causing intermittent leaks that are frustrating to diagnose. Buy OEM once and avoid the callback.
Easy to Moderate (2/5). Replacement involves detaching the old hose at the collector box and drain fitting and seating the new one — typically 15–20 minutes with the furnace off. A licensed technician is recommended if your furnace uses clamped or barbed connections you're unfamiliar with.