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The Goodman 20201802 Drain Hose Tube is a genuine OEM condensate line for the AMVC951155DXAC and compatible Goodman/Amana high-efficiency furnaces. It carries acidic condensate between the secondary heat exchanger, drain trap, and pressure-switch ports. Because furnace condensate is mildly corrosive, using the correct OEM-grade tubing ensures long service life and a leak-free seal at every barbed fitting.
The OEM tube is cut to the correct inner diameter and length for a snug, clamp-free press-fit on your furnace's ports. Generic hardware-store tubing may be the wrong bore, kink at bends, or degrade faster against acidic condensate, leading to leaks and slow drainage.
Difficulty: Easy — a simple push-on hose replacement. Shut off power, remove the old hose, seat the new tube fully on each barb, and check for leaks after priming. A quick 10–15 minute DIY repair.