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The Goodman 20171701 is the factory OEM condensate drain trap for the GKS90703BXAE high-efficiency gas furnace and related Goodman/Amana 90%+ AFUE models. In a condensing furnace, combustion produces acidic condensate that must be routed away safely — this trap collects and drains that condensate while maintaining a water seal that blocks flue gases from escaping back into the cabinet.
This genuine Goodman OEM trap is molded to match the furnace's drain-port geometry and hose routing exactly. Generic traps rarely align with the factory connections and can leak or trap improperly, risking condensate spillover and flue-gas recirculation. OEM is strongly recommended for combustion-side components.
Easy–Moderate (2/5). Disconnect the inlet and outlet hoses, remove the trap, prime the new trap with water, and reconnect. Turn off power and gas first, and check for leaks after restarting.