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The Goodman 20171701 is a genuine OEM condensate drain trap built as a direct-fit replacement for the GMH950703BXAD 96% AFUE condensing furnace. In high-efficiency furnaces the secondary heat exchanger produces acidic condensate; this trap channels that water safely to the drain while maintaining a water seal that blocks flue gases from escaping and keeps the pressure-switch circuit reading correctly.
The OEM trap matches Goodman's port spacing, seal geometry, and drain routing exactly, so it maintains the correct water column and pressure balance out of the box. Generic traps frequently differ in fitting size or trap depth, which can trigger pressure-switch lockouts, water backup, or flue-gas leakage. For a sealed-combustion appliance, OEM fit matters.
Moderate (3/5). Involves disconnecting condensate tubing and pressure-switch hoses, clearing any residual water, and re-priming the trap. Power and gas off before servicing; verify all hoses are seated and leak-free, then confirm proper draining on startup. Recommended for a handy DIYer or HVAC technician.