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The Goodman 20201802 Condensate Drain Hose Tube is a genuine OEM replacement part engineered for the GKS91155DXAA gas furnace and compatible Goodman/Amana high-efficiency models. This flexible drain tube routes condensate away from the secondary heat exchanger and collector box, keeping the drainage path clear and preventing overflow, water damage, and nuisance pressure-switch lockouts.
This is a factory-original Goodman part built to exact furnace tolerances for a leak-free connection. Generic aftermarket tubing often uses off-spec inner diameters or lower-grade material that can kink, harden, or slip at the collector box fitting — leading to repeat leaks. The OEM 20201802 is the reliable, install-once choice.
Easy (1/5). A basic slip-fit replacement most homeowners can complete in minutes with the furnace powered off. No special tools required. If you are unsure about your model compatibility, consult a licensed HVAC technician.