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The Goodman 20201802 Drain Hose Tube is a genuine OEM condensate hose for the Goodman/Amana AMV90453BXAB 90%+ high-efficiency gas furnace. This flexible tube routes acidic condensate between the secondary heat exchanger, drain trap, and outlet, maintaining a sealed path so water drains reliably without leaking into the cabinet. Over time, factory hoses can harden, crack, or clog with sediment — a failing hose leads to water leaks, corrosion, and pressure-switch faults that lock out the furnace.
OEM vs. Generic: The OEM hose is molded to the correct length, diameter, and bend radius for the AMV90453BXAB, so it seats on the factory ports without kinking or restricting flow. Generic tubing cut to length can kink, slip off, or leak at the connections. OEM ensures a clean, sealed drain path.
Install difficulty: Easy. Slide the old hose off its ports, note the routing, and press the new hose fully onto each fitting — about 10 minutes. Flush the drain trap and line while you're in there to keep condensate flowing freely. Shut off power before service.