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The Goodman 20171701 is a genuine OEM condensate drain trap built for the Amana/Goodman AMH950904CXAC and compatible 90%+ high-efficiency gas furnaces. In a condensing furnace, combustion produces acidic water that must drain away continuously — this trap maintains a water seal that lets condensate flow out while blocking flue gases and preventing pressure-switch faults. A cracked, clogged, or brittle trap is a frequent cause of water leaks, drain overflow, and nuisance shutdowns.
The OEM trap matches the factory port geometry and mounting for a leak-free, drop-in fit. The generic equivalent delivers the same drainage function at a lower cost and suits general repairs where exact factory routing is flexible. Both maintain the required water seal against flue-gas escape.
Easy to Moderate (2/5). Most homeowners complete this in 20–30 minutes. Power down the furnace, disconnect and drain the old trap, transfer or replace the drain hoses, and prime the new trap with water before restart. Check for leaks on first heating cycle.