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The Goodman 10254303 Rubber Coupling is the genuine OEM flexible seal used to join condensate and drain connections on the AMV90905DXBB and compatible Goodman and Amana 90%+ AFUE furnaces. This coupling forms a watertight, vibration-tolerant connection between drain components, preventing the acidic condensate leaks that lead to rust, floor damage, and pressure-switch faults. Small and inexpensive, it is one of the most common wear items to replace during furnace drain service.
A generic coupling that is slightly off in diameter or durometer will weep or slip under thermal cycling. The genuine Goodman 10254303 is molded to the exact factory dimensions for a secure, leak-free seal and preserves warranty coverage.
Easy (1/5). Shut off power and gas, slide the old coupling off, and press the new one into place — reuse the clamp if equipped. Confirm there are no drips after restoring operation. A quick, tool-light repair suitable for most DIYers.