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The Goodman 20201802 is a genuine OEM condensate drain hose/tube designed as a direct replacement for the AMVC950905DXAD Amana/Goodman high-efficiency gas furnace. In a condensing furnace, the secondary heat exchanger produces acidic condensate that must be routed safely away; this hose is a factory-molded piece cut and shaped to fit the drain routing of your specific furnace platform.
This OEM piece is pre-formed to the correct length and bend for your furnace's drain layout. Generic bulk tubing can be substituted in some cases, but must be cut and routed correctly to avoid kinks, sags, and trapped condensate that lead to leaks and lockouts. The factory hose eliminates guesswork.
Replacement is a quick 10-minute job. Power down the furnace, note the routing of the old hose, disconnect it from its barbed fittings, and press the new hose fully onto each fitting. Verify all connections are tight and that condensate flows freely to the drain trap after restart. Clearing a clogged drain trap at the same time is good preventive maintenance.