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The Goodman 10254303 is a genuine OEM rubber coupling designed for the GMH950905CXAA high-efficiency condensing gas furnace and related Goodman/Amana models. This flexible coupling joins condensate drain lines, inducer drain ports, and pressure-switch tubing, creating a watertight, vibration-dampening seal. On 95% AFUE condensing furnaces the coupling is critical — these units produce acidic condensate that must drain reliably, and a cracked or hardened coupling is a common cause of nuisance pressure-switch faults and water leaks around the furnace base.
The OEM 10254303 is molded to the precise inside diameter and durometer the furnace was designed around, ensuring a leak-free press fit. Generic rubber couplings can work if diameters match exactly, but a loose or over-tight aftermarket part risks leaks or restricted drainage. Given the low cost, OEM is the safest choice.
Very easy (1/5). Slide off the old coupling, seat the new one, and secure with the existing clamp if present. No tools beyond a flat screwdriver are typically needed, and install takes under 10 minutes. Verify the drain flows freely after replacement.