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The Goodman 10254303 Rubber Coupling is a genuine OEM sealing and vibration-isolation component for the WGFM195090S4CAD gas furnace and compatible Goodman/Amana models. This flexible rubber part is used to make a leak-tight, pressure-safe connection — commonly on condensate drain, pressure-switch tubing, or component pass-throughs — while absorbing vibration and preventing rattle. Rubber couplings and grommets harden, crack, and shrink over years of heat cycling, so replacing an aged one restores a proper seal and quiet operation.
The genuine OEM 10254303 is molded to the exact bore and durometer the furnace requires, so it seats fully and seals on the first fit. Generic rubber parts are often the wrong diameter or a softer compound that fails early, leading to leaks or air-pressure faults on the pressure switch. For a few dollars, the OEM part removes all doubt.
Very Easy (1/5) — With power off, slide out the worn coupling and press the new one into place. No tools required in most applications, and the job takes only a couple of minutes. A light coat of the correct lubricant can ease installation on tighter fits.