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The Goodman 20201802 is a factory condensate drain hose/tube for the GCH950704CXAC high-efficiency gas furnace and compatible Goodman/Amana models. This flexible line routes acidic condensate from the drain trap and collector box to the drain, resisting the heat and corrosion that stiffen or crack ordinary tubing over time. A brittle, kinked, or leaking hose causes puddles at the furnace base, pressure-switch faults, and drainage backups.
The OEM hose is pre-cut to the correct length with the right inner diameter to seat firmly on Goodman's fittings, avoiding the slow leaks and kinks common with generic tubing trimmed to fit. For a component that carries corrosive condensate inside your cabinet, the genuine OEM part is the low-risk choice.
Easy. Slip the old hose off its barbed fittings and press the new one on — no tools or gas work required in most cases. Power down the furnace first, confirm the routing has no kinks or high spots, and check for a clear, leak-free flow after reassembly.