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The Goodman 10254303 Rubber Coupling is a genuine OEM sealing component for the GKS90704CXAC high-efficiency gas furnace. This flexible coupling joins drain or condensate/vent connections, forming a watertight, vibration-tolerant seal between components. Its OEM rubber compound is sized to the exact inner and outer diameters of the furnace's fittings, preventing leaks that generic couplings often introduce.
A coupling that is even slightly off-size will weep condensate or loosen with thermal cycling. This genuine Goodman OEM coupling matches the factory dimensions and durometer, so it seats snugly and stays leak-free through years of heating cycles.
Easy — DIY friendly (1/5). Power down the furnace, loosen the clamps, slide off the old coupling, fit the replacement, and re-tighten the clamps. No special tools required. Confirm a dry, leak-free connection after restarting.