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The Goodman 20201802 Drain Hose Tube is a genuine OEM condensate drain component engineered for the Goodman GCH90704CXAA gas furnace and compatible high-efficiency models. In condensing furnaces, the secondary heat exchanger and collector box produce acidic condensate that must be routed safely to a drain. This molded hose tube carries that condensate away from the cabinet, preventing water pooling, corrosion, and nuisance safety-switch lockouts.
Choosing the genuine OEM 20201802 guarantees an exact-fit connection to Goodman's factory drain trap and collector box, with the correct diameter and bend geometry. Generic aftermarket tubing may leak at the fittings or kink under the cabinet, leading to overflow and water damage. For condensate handling — where a small leak causes big problems — OEM is the safe choice.
Easy (1/5). A basic DIY replacement: power down the furnace, disconnect the old tube from the drain trap, seat the new 20201802 fully onto each fitting, and confirm no kinks. No special tools required. Always run a heating cycle afterward and check for leaks.
This is a genuine Goodman replacement part. Verify your model number before ordering to ensure correct fit.