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The Goodman 20201802 is a genuine OEM condensate drain hose/tube for the GCH950904CXAA high-efficiency gas furnace. It carries acidic condensate between the secondary heat exchanger, collector box, drain trap, and pressure-switch ports. Over time these flexible lines harden, crack, or clog with biofilm, which causes leaks, pressure-switch faults, and furnace lockouts. Swapping in a fresh factory tube restores a clean, leak-free condensate path.
This OEM Goodman tube is pre-cut to the correct length with the exact inside diameter the factory barbs require, so it seats tightly without kinking or slipping. Generic hose cut to size often has the wrong bore or wall stiffness, leading to loose connections and slow drips. Because condensate is corrosive, using tubing rated for the application matters for long-term reliability.
A 10–15 minute job. Power down the furnace, note which ports the tube connects, pull the old hose off the barbed fittings, and press the new one fully onto each barb. Confirm there are no kinks and that the run maintains a downhill slope to the trap. Run a heating cycle and check for drips.