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The Goodman 10254303 Rubber Coupling is a genuine OEM sealing component engineered for the GCV90905DXBA high-efficiency gas furnace and compatible Goodman/Amana platforms. This flexible coupling creates a leak-free connection between drain and vent sections, preventing condensate seepage and maintaining proper pressure isolation inside the furnace cabinet.
The genuine OEM coupling is molded to exact factory dimensions and durometer, ensuring a positive seal that resists heat cycling and moisture. Generic couplings may fit loosely, harden prematurely, or allow condensate leaks that damage control boards. For a furnace, OEM is strongly recommended.
Easy — a slip-on replacement requiring no tools. Power down the furnace, remove the old coupling, and press the new one into place. 5–10 minute job for most DIYers.