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The Goodman 10254303 Rubber Coupling is a genuine OEM connector/seal used on GCH91155DXAB high-efficiency furnaces. This flexible coupling joins condensate drain or hose sections and forms a leak-free, vibration-dampening seal between components. Cracked or hardened couplings are a frequent source of condensate leaks and water pooling around the furnace base, so replacing a worn coupling protects the surrounding cabinet and floor.
The genuine OEM coupling is sized to the exact hose diameters and durometer used in this furnace, giving a snug leak-free slip fit. Generic couplings may be too loose or too stiff, leading to weeping joints or blow-off under condensate flow. For a small, critical seal, OEM is the safe choice.
Rated Very Easy (1/5) — slide off the old coupling, slide on the new one, and secure any clamps. No tools typically required. Verify a tight fit and run a condensate test to confirm no leaks.