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The Goodman 10254303 Rubber Coupling is a genuine OEM sealing component for the WGFM195090S5CAA 95% AFUE modulating gas furnace and other compatible Goodman/Amana high-efficiency models. This flexible coupling joins and seals drain or vent tubing connections, absorbing vibration while preventing condensate and air leaks. A hardened, cracked, or missing coupling is a common cause of slow condensate leaks and pressure-switch faults on condensing furnaces.
OEM vs. Generic: The genuine Goodman 10254303 is sized to the exact inner and outer diameters of your furnace's tubing, giving a tight, leak-free press fit. Generic couplings that are slightly over- or undersized can slip, weep, or require hose clamps that don't seat properly. The OEM part restores factory sealing and protects surrounding components from moisture damage.
Install difficulty: Very easy (DIY-friendly). Usually under 10 minutes. Shut off power and gas, slide off the old coupling, clean the tubing ends, and press the new coupling fully onto both connections. Run a brief condensate test to confirm a leak-free seal before returning the furnace to service.