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The Goodman 10254303 Rubber Coupling is a genuine OEM sealing coupling used on the Goodman GKS90453BXAC high-efficiency gas furnace. This flexible coupling connects condensate drain and induced-draft components, providing a leak-tight seal while absorbing vibration between rigid plastic fittings. Over time the factory rubber can harden or crack, causing condensate leaks or air seepage — replacing it restores a clean, sealed connection.
The OEM coupling matches the exact inner diameter and durometer Goodman specifies, ensuring a snug, leak-free press fit. A Generic coupling can work if the ID matches precisely, but off-spec rubber may not seal the condensate path reliably on a 90%+ furnace.
Very Easy (1/5). Slide-on/clamp-on replacement — no tools beyond a screwdriver for any hose clamp. Inspect the mating fittings for debris before seating the new coupling.