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The Goodman 20171701 condensate drain trap is designed for the GME951005DXAA modulating gas furnace and related high-efficiency Goodman and Amana models. On a condensing furnace, combustion produces acidic water that must be collected and drained safely. This trap captures that condensate and forms a water seal that prevents flue gases from escaping through the drain line while allowing liquid to flow out — a code-required component for proper venting and safe operation.
Genuine OEM 20171701 matches the exact port sizes, float/seal design, and mounting of your furnace so the drain routes correctly and the flue seal holds. A generic trap may be cheaper but rarely lines up perfectly with factory tubing — a poor fit invites leaks and flue-gas bypass. For a code-critical part, OEM is the safe pick.
Moderate (2/5). Power down the furnace, disconnect the condensate hoses (label them first), remove the trap, and install the new one with all ports reconnected in their original positions. 20–30 minutes. Prime the trap with water and verify free drainage before restarting.