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The Goodman 20201901 is a genuine OEM condensate drain hose tube engineered for the GMH951155DXAG 96% AFUE two-stage gas furnace and compatible Goodman/Amana high-efficiency models. In a condensing furnace, the secondary heat exchanger produces acidic condensate that must be routed cleanly to the drain trap — this molded tube carries that flow reliably and resists the corrosion, kinking, and hardening that cause leaks and lockout faults over time.
Generic aftermarket tubing is often cut to a universal length and made from thinner material that stiffens and cracks near the heat exchanger. This factory OEM part is molded to the exact routing and inside diameter Goodman engineered for this cabinet, so it seats correctly at both connection points, maintains proper drainage slope, and won't trip pressure-switch or flame faults from a slow drain. Installing the genuine part protects your warranty and avoids repeat service calls.
Easy (1 of 5). Shut off power and gas, disconnect the old hose at both ends, slide the new tube into place, and secure the clamps. Most homeowners and technicians complete this in under 15 minutes with basic hand tools. Always verify the drain trap is clear and the tube maintains a downward slope before restoring power.