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The Goodman 10254303 Rubber Coupling is the OEM sealing connector used in the GKS91155DXAC gas furnace. This flexible rubber coupling joins condensate drain, trap, or venting components and forms a leak-tight seal that absorbs minor vibration and alignment differences. Over time rubber couplings harden, crack, or take a set, leading to drain leaks, water around the furnace base, or pressure-switch nuisance trips from a compromised condensate path. Replacing this inexpensive part restores a clean, sealed connection.
The genuine OEM Goodman 10254303 is molded to the exact inner diameter and durometer that mate cleanly with your furnace's fittings. Generic couplings may be close in size but can leak if the diameter or wall thickness differs. Given the very low cost of the OEM part, we recommend genuine for a guaranteed seal.
Very easy (1/5). No tools or power interruption required in most cases — slide off the old coupling, seat the new one fully onto both fittings, and confirm it is snug. Run the furnace through a heating cycle and check for drips at the joint.
Stop drain leaks on your GKS91155DXAC with the genuine, low-cost Goodman 10254303 rubber coupling.