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The Goodman 20201802 is a genuine OEM condensate drain hose tube engineered for the GKS90904CXAC gas furnace and compatible Goodman/Amana high-efficiency models. During normal operation a 90%+ AFUE furnace produces acidic condensate that must be routed safely away from the heat exchanger and burner assembly. This factory-spec drain tube maintains the correct fit and flow path so your furnace drains reliably and avoids the water backups that trigger blocked-drain lockouts.
The genuine Goodman OEM tube is molded to the exact bend radius, wall thickness, and connection diameter specified by the factory, ensuring a leak-free seal at both ends. Universal aftermarket tubing often requires trimming or adapters and can kink or loosen over time, leading to condensate leaks and premature drain-switch faults. For a drop-in, worry-free repair, OEM is the recommended choice.
Easy (1/5). This is a simple slip-on replacement requiring no special tools. Power down the furnace, remove the old tube from its fittings, seat the new tube fully, and confirm secure connections. Most DIYers complete the swap in under 15 minutes. If you are unsure about your drainage path, consult a licensed HVAC technician.