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The Goodman 20201802 Drain Hose Tube is a genuine OEM condensate hose for the WGFM295045V3BAB and other Goodman/Amana high-efficiency condensing furnaces. It routes acidic condensate from the secondary heat exchanger and pressure-switch ports through the drain trap, keeping the water path sealed and correctly positioned. Because it is molded to the exact length and bend of the factory routing, it will not kink, sag, or trap air the way trimmed generic tubing often does.
OEM vs. Generic: A high-efficiency furnace depends on unobstructed, air-tight condensate routing. The 20201802 matches Goodman's port diameters and pre-formed bends so it seats snugly without leaks or air pockets. Universal bulk tubing can crack at the fittings or hold condensate, triggering pressure-switch faults. This inexpensive OEM part is cheap insurance against nuisance shutdowns.
Install difficulty: Easy (1/5). A 10-minute job — power down the furnace, pull the old hose off its barbed ports, and press the replacement on in the same routing. Flush the drain line while you are in there and confirm the hose is free of kinks. Restart and watch for a clean, steady condensate flow. Always cut power to the furnace before servicing.
Genuine Goodman quality, shipped fast from National HVAC Parts.