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The Goodman 20201902 is a genuine OEM 23-inch condensate drain hose tube built for the GCH90703BXAB high-efficiency gas furnace. This longer run of drain tubing connects the collector box or secondary heat exchanger to the condensate trap, carrying acidic condensate away from sensitive electronics. Using the correct 23-inch length prevents sagging loops and low spots where water can pool, freeze, or breed algae and cause nuisance lockouts.
A generic hose cut to a rough length can be too short to reach the trap or too long, creating kinks and bellies that trap condensate. The OEM 20201902 arrives pre-sized to 23 inches with the correct inner diameter, so it routes cleanly and seals at both ends. OEM tubing is also formulated to resist the mild acidity of condensing-furnace condensate over years of service.
Easy (1/5). Turn off power and gas, release the clamps on the old hose, remove it, and route the new 23-inch tube along the same path. Confirm there are no low loops, reattach the clamps, and run the furnace to check for leaks. Typical replacement time is 15–20 minutes.
Genuine OEM Goodman part. Please verify your model number before ordering.