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The Goodman 20201901 is a genuine OEM condensate drain hose tube built for the AMH951155DXAG 95% AFUE furnace and compatible Goodman/Amana condensing models. This is a longer, contoured drain segment that carries acidic condensate from the collector box or inducer housing to the furnace trap. Its factory geometry maintains the correct downward slope for gravity drainage, avoiding standing water that can freeze, harbor debris, or trigger a pressure-switch lockout.
The OEM 20201901 arrives pre-bent to the exact factory profile, so it clears internal components and seats on every barb without strain. Generic hose requires cutting and manual routing, which invites kinks and slow leaks. Because condensate is corrosive, the OEM material is spec'd to resist degradation over the furnace's life.
Plan on 10–15 minutes. Shut off power, catch any residual water, remove the clamps, work the old tube off its fittings, and press the new hose fully onto each connection. Re-clamp, prime the trap, and verify free drainage and correct pressure-switch operation before finishing.