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The Goodman 10254303 Rubber Coupling is a genuine OEM sealing component used on the Goodman/Amana AKSS920703BXAA high-efficiency gas furnace and related models. This flexible rubber coupling joins condensate/drain tubing and inducer or trap connections, forming a leak-tight seal that keeps combustion condensate contained and routed to the drain. A cracked, hardened, or missing coupling is a common cause of water leaks and pressure-switch faults on condensing furnaces.
The genuine OEM coupling is molded to the exact inner and outer diameters of your furnace's tubing, so it seats fully and seals without clamps working loose. Generic hardware-store couplings are often the wrong durometer or size and tend to weep at the joint.
Easy — Slip-fit replacement, usually a 5-minute job. Power down the furnace, note the routing of the old coupling, remove and replace, then run the furnace and confirm no water leaks at the joint.