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The Goodman 10254303 Rubber Coupling is a genuine OEM component for the GCV90704CXBA gas furnace and related Goodman/Amana models. This flexible rubber coupling connects and seals venting or drain-side components while absorbing vibration from the inducer assembly, keeping the joint airtight and quiet during operation. Over time the original coupling can harden, crack, or take a set, causing air/condensate leaks and rattling — replacing it with the correct OEM part restores a clean seal.
Dimensions matter on a sealing coupling — the correct inside diameter and wall thickness are what create the leak-free fit. This OEM Goodman coupling is molded to spec. Generic hose or coupling stock may be close but not exact, leading to a loose fit or premature failure.
Install difficulty: Easy (1/5). Power down the furnace, loosen or remove any retaining clamps, slide off the old coupling, and press the new one into place. No tools beyond a nut driver or pliers are typically required, and the job takes only a few minutes.