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The Goodman 20171701 Condensate Drain Trap is a genuine OEM part for the GKS90703BXAD high-efficiency gas furnace. On 90%+ AFUE furnaces, combustion produces acidic condensate that must drain away while the trap's water seal blocks flue gases from escaping into the cabinet. This trap keeps drainage flowing and the seal intact.
The OEM trap is molded to match the furnace's port locations, slope, and hose diameters so it drains fully and holds its seal. Generic or universal traps often force awkward routing, trap air, or leak at mismatched fittings — leading to pressure-switch faults, water damage, or flue-gas spillage. OEM fit prevents callbacks.
Moderate (2/5). Disconnect the drain hoses and pressure-switch tubing, swap the trap, then prime it with water and confirm the pressure switch closes on startup. Cut power before servicing and check for leaks.
Compatible with Goodman GKS90703BXAD. Confirm your model before ordering.