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The Goodman 20201902 is a genuine OEM 23-inch condensate drain hose tube engineered for the GKS90703BXAC gas furnace and compatible Goodman/Amana 90%+ AFUE condensing models. It routes acidic condensate away from the secondary heat exchanger and collector box to the drain trap, preventing water backup, overflow, and corrosion inside the burner compartment. A cracked, brittle, or clogged drain hose is a common cause of nuisance lockouts and pressure-switch faults on high-efficiency furnaces.
This is the genuine Goodman factory hose, cut and formed to the exact length and bend radius your furnace was designed around. Generic aftermarket tubing often needs trimming, kinks at the collector-box fitting, and may not withstand acidic condensate over time. Choosing OEM guarantees a leak-free seal and full compatibility with the factory drain trap.
Easy (1/5). Power down the furnace, release the hose clamps, slide off the old hose, and install the new one in the same orientation. No special tools required — most homeowners complete this in under 15 minutes. If you are unsure, a licensed HVAC technician can install it during routine service.