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The genuine Goodman 20201901 condensate drain hose tube is the factory-specified drain line for the AMH951155DXAF high-efficiency gas furnace. On 95%+ AFUE condensing furnaces, combustion byproducts create acidic condensate that must be routed safely to the drain. This OEM tube is molded to the exact bend radius and fitting size for your unit, so it seats without kinks or leaks that can trip a pressure switch or cause water damage around the blower compartment.
OEM vs. Generic: Generic drain hose cut to length is cheaper, but it rarely matches the preformed bends and fitting diameters of the original. A loose or over-flexed aftermarket hose can trap condensate, freeze in cold returns, or pop off the drain trap. The OEM 20201901 is dimensionally identical to the tube your furnace shipped with, guaranteeing a leak-free connection and correct condensate slope.
Install difficulty: Easy (1/5). Power down the furnace at the switch, pull the old hose off the drain trap and collector box nipple, slide the new 20201901 into place, and secure any factory clamp. No tools beyond a nut driver or pliers are typically required. Verify a full condensate cycle for leaks before closing the cabinet.
Protect your furnace and your home with the correct factory drain component. This is the exact OEM Goodman part, not a substitute.