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The Goodman 10254303 Rubber Coupling is a genuine OEM sealing component used in the GMH950704CXAD 96% AFUE two-stage condensing furnace and compatible Goodman/Amana models. In high-efficiency furnaces, rubber couplings join condensate drain lines, trap fittings, and inducer/collector-box tubing, providing a flexible, leak-tight connection that tolerates vibration and thermal movement. A cracked or hardened coupling is a common cause of condensate leaks, pressure-switch faults, and nuisance lockouts on 90%+ furnaces.
The genuine Goodman OEM 10254303 is molded to the exact inside diameter and durometer your furnace's fittings require, so it seats fully and seals without over-tightening the clamps. Generic hardware-store couplings may be close but not exact, leading to slow condensate weeps that corrode the burner area and trip the pressure switch. For a reliable seal, use the OEM coupling.
Rated Very Easy (1/5) — a 10-minute job. Power down the furnace, catch any residual water, loosen the hose clamps, slide off the old coupling, and press the new one on. Retighten the clamps snugly (not crushed) and run the furnace to confirm no leaks. No special tools beyond a nut driver or screwdriver.