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The Goodman 10254303 is a genuine OEM rubber coupling used to create a flexible, leak-tight connection on the GKS90703BXAG gas furnace. Couplings like this join condensate drain, trap, or vent components and absorb vibration while maintaining a positive seal. Over time rubber couplings harden, crack, or leak — replacing this inexpensive part restores a proper seal and prevents water damage or nuisance drain faults.
The OEM coupling matches the exact inside diameter and durometer of the factory part for a guaranteed slip-fit. The generic option is a low-cost equivalent rubber coupling suitable when precise OEM sizing isn't critical.
Very Easy (1/5) — Slip-on replacement, often secured by a hose clamp. Power down the furnace, remove the old coupling, seat the new one fully, and re-clamp. No tools beyond a nut driver required.