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The genuine OEM Goodman 20171701 condensate drain trap is a direct-fit assembly for the Goodman GKS90704CXAA high-efficiency (90%+ AFUE) gas furnace. As a condensing furnace, the GKS90704CXAA produces acidic condensate that must drain freely while the trap's water seal blocks flue gases from escaping into the cabinet. A cracked or clogged trap causes water leaks, pressure-switch faults, and ignition lockouts.
The genuine Goodman trap matches the factory port spacing, barb sizes, and internal geometry that maintains the correct water seal. Generic traps often leak at the fittings or hold the wrong water column, tripping the pressure switch. For a part tied directly to safe flue-gas containment and reliable operation, OEM is strongly recommended.
Moderate (3/5) — Disconnect condensate and pressure-switch tubing, remove the old trap, install the new one, then prime it with water before startup. Confirm all hose connections are tight and drainage is free. Shut off power and gas before servicing.
Verify your model and serial number before ordering.