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The genuine Goodman 20201901 condensate drain hose tube is the factory-specified drain component for the Goodman GKS90704CXAC gas furnace and compatible models. This OEM part routes condensate away from the furnace's secondary heat exchanger and drain trap, keeping your high-efficiency system operating safely and free of water backup that can trigger pressure-switch lockouts.
Unlike universal generic tubing, this genuine Goodman 20201901 is molded to the exact length, bend radius, and connector fit of your furnace, eliminating leaks and kinks that cause condensate overflow. Generic aftermarket hoses often require cutting and may not seat correctly at the trap, risking water damage and nuisance lockouts. Choose OEM for guaranteed fit and warranty compliance.
A basic slip-on replacement requiring no special tools. Power down the furnace, disconnect the old hose from the drain trap and heat exchanger nipple, seat the new hose fully, and secure the clamp. Always verify condensate flow after reassembly.