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The Goodman 20201902 is a genuine OEM 23-inch condensate drain hose/tube built for the GCH91155DXAA high-efficiency gas furnace and compatible Goodman/Amana models. The pre-cut 23 in. length is engineered to reach between the collector box/trap and the furnace drain outlet without slack loops or tight kinks that trap water. Correct condensate routing keeps the drain path free-flowing and helps prevent nuisance pressure-switch faults on condensing furnaces.
The value of this part is its exact 23 in. factory length. A generic tube cut too long sags and pools condensate; cut too short, it strains the connections and leaks. The OEM 20201902 installs at the correct length every time, protecting the burner area and control board from moisture.
Very Easy (1/5). Remove the old hose at both fittings, seat the 23 in. replacement fully, and secure clamps if equipped. Shut off power first, then confirm free condensate drainage and inspect for leaks after restart.