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The Goodman 20201902 is a genuine OEM 23-inch condensate drain hose tube engineered for the AMV91155DXBC high-efficiency gas furnace. As a 90%+ AFUE condensing unit, this furnace produces acidic condensate during normal operation, and this factory-spec drain tube routes that moisture safely from the collector box and secondary heat exchanger to the drain trap. A cracked, kinked, or brittle drain hose is one of the most common causes of nuisance lockouts, water leaks, and pressure-switch faults, making this an essential wear part to keep on hand.
This is the genuine Goodman/Amana OEM component, cut and formed to the exact length and diameter the furnace was designed around. Generic or universal hose can be substituted, but incorrect inner diameter or wall stiffness leads to poor slip-fit seals, kinks at bends, and repeat leaks. The OEM tube guarantees a leak-free connection and preserves your equipment warranty.
A basic DIY-friendly swap. Power down the furnace, slip the old hose off its fittings, route the new 20201902 tube along the same path, and secure the connections. No special tools required — most homeowners complete it in under 15 minutes.