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The genuine Goodman 20201902 is a 23-inch flexible condensate drain hose tube engineered for the AMV90453BXBB 90%+ high-efficiency gas furnace. During normal operation, a condensing furnace produces water vapor that must be routed safely to the drain trap and out of the cabinet. This factory-spec hose carries that condensate away from the secondary heat exchanger and inducer assembly, protecting internal components from moisture damage and corrosion.
The OEM 20201902 is cut to the exact factory length and diameter, so it seats on the drain nipples and trap without leaks or tension. Generic aftermarket tubing often requires field trimming and may not match the original bend radius, increasing the risk of kinks that block drainage and trigger a pressure-switch lockout. For a leak-free, drop-in fit, the OEM hose is the reliable choice.
Easy (1/5). Slip off the old hose, route the new tube along the original path, and secure both ends. Basic hand tools; typically completed in 10–15 minutes. Always shut off power and gas before servicing.