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The Goodman 20201902 is a genuine OEM 23-inch condensate drain hose designed for the GKS90904CXAA high-efficiency gas furnace and compatible Goodman/Amana 90%+ models. Pre-cut to the exact factory length, it routes acidic condensate through the drain circuit without the guesswork of trimming bulk tubing. A correctly sized hose maintains proper slope to the trap, preventing standing water, freeze-ups, and pressure-switch lockouts.
Length matters on drain hoses — the OEM 20201902 is factory-cut to 23 inches with the correct bore for the GKS90904CXAA drain path. A generic hose cut on-site can end up too short, too long, or the wrong diameter, causing sags and leaks. Genuine tubing installs clean and drains reliably.
Easy (1/5). Turn off the furnace, pull the old hose off its barbed fittings, and press the pre-cut 23" replacement onto the same connections. Confirm a continuous downward slope to the trap. A simple 10-15 minute, no-tools replacement.