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The Goodman 10254303 is a genuine OEM rubber coupling used to seal and connect the drain, condensate, or vent tubing on Goodman 90%+ AFUE condensing gas furnaces, including the GKS90453BXAE. Over time, the original rubber becomes brittle and cracks, leading to condensate leaks and combustion-air seal failures. Replacing it with the correct factory part restores a watertight, code-compliant connection.
Generic universal couplings are often the wrong durometer or diameter, so they weep at the joint or slip under thermal cycling. This genuine OEM 10254303 matches the factory bore, wall thickness, and rubber compound exactly — no shimming, no leaks, and full compatibility with Goodman's warranty guidance.
Easy (DIY-friendly). Power down the furnace, slide off the old coupling, clean the fittings, and press the new coupling into place with the supplied clamps. Typical replacement takes under 15 minutes with basic hand tools.
Always shut off electrical power and gas before servicing. If you're unsure, consult a licensed HVAC technician.