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The Goodman 20513001 evaporator drain fitting is a genuine OEM replacement designed for the Goodman WGGE4342A070MAB gas furnace. This small but critical component routes condensate away from the evaporator coil and secondary heat exchanger, preventing water pooling, corrosion, and nuisance lockouts caused by clogged or cracked drain connections. A cracked or brittle drain fitting is one of the most common causes of water leaks around a furnace cabinet — replacing it restores a proper, leak-free drain path.
This is a genuine Goodman OEM fitting, molded to the exact dimensions and thread/barb profile of the original. Generic aftermarket fittings often require adapters or shimming and can leak at the seam. The OEM part seats correctly the first time and maintains the manufacturer's drainage geometry.
A basic DIY repair — typically 10–15 minutes with hand tools. Power down the furnace, disconnect the existing drain line, swap the fitting, and reconnect. Always verify proper drainage after install and check for leaks during the first heating cycle.
Genuine OEM part backed by exact-fit compatibility for your WGGE4342A070MAB.