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The Goodman 20171701 condensate drain trap is the factory-original drainage component for the GKS91155DXAG 95%+ AFUE gas furnace. On high-efficiency condensing furnaces, combustion produces acidic condensate that must be captured and drained safely. This trap maintains the water seal that blocks flue gases from escaping through the drain line while routing condensate to your drain. A failed, cracked, or clogged trap is a common cause of furnace lockouts triggered by the pressure switch.
Our OEM Goodman trap is molded to the exact port geometry and sealing spec of your furnace's drain assembly, guaranteeing a leak-free water seal. Generic universal traps often require adapters and can allow pressure-switch faults if the seal height is wrong. For condensing furnaces, we recommend OEM to avoid nuisance lockouts.
Easy (1/5). Disconnect the drain hoses, remove the old trap, install the new one, and reconnect. No tools beyond a screwdriver in most cases. Always shut off power and gas before servicing.