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The Goodman 10254303 Rubber Coupling is a genuine OEM flexible connector used on GMH950904CXAF 95% AFUE condensing furnaces. It seals inducer, drain, or pressure-tubing connections, absorbing vibration while keeping the sealed combustion and condensate path airtight. Cracked or hardened couplings are a common cause of pressure-switch faults, condensate leaks, and combustion-air whistling on high-efficiency furnaces.
OEM (this part): Exact inside diameter and durometer for a leak-free press fit on the factory ports. Generic: Universal hose or couplings may not seal correctly, leading to pressure-switch nuisance trips or slow condensate leaks. OEM is inexpensive insurance for a sealed-combustion furnace.
Very Easy (1/5) — under 10 minutes. Power down the furnace, slide off the old coupling (release any clamps), press on the new one, and re-secure. No tools beyond a nut driver for clamps.