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The Goodman 20201902 is a genuine OEM 23-inch condensate drain hose/tube for the GCH950904CXAA high-efficiency gas furnace. Pre-cut to 23 inches, it carries acidic condensate between the collector box, secondary heat exchanger, and drain trap along the longer runs inside the furnace cabinet. When these lines stiffen, crack, or clog with biofilm, the result is condensate leaks, tripped pressure switches, and furnace lockouts. Installing a correctly sized factory tube restores a clean, leak-free drain path.
This OEM Goodman hose ships at the exact 23-inch length with the factory inside diameter, so it reaches its ports without stretching or slack and seats tightly on the barbs. Bulk generic tubing has to be cut to length and may use the wrong bore or wall thickness, inviting loose joints and drips. For a corrosive condensate line, the pre-sized factory part avoids guesswork.
About 15 minutes. Power down the furnace, note the routing of the old 23-inch tube, remove it from the barbed fittings, and press the replacement fully onto each port. Keep the run sloped downhill to the trap with no kinks, then run a heating cycle and inspect for leaks.