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The Goodman 10254303 Rubber Coupling is a genuine OEM sealing coupling used in the condensate/drain and induced-draft plumbing of Goodman GCH90703BXAB gas furnaces. This flexible rubber coupling joins drain or vent components with an airtight, watertight connection, absorbing minor vibration and thermal movement while preventing leaks that can trigger pressure-switch faults or water damage.
Genuine Goodman rubber couplings are sized to the exact inner and outer diameters of the mating components, delivering a snug, gap-free seal. Generic couplings often fit loosely or harden prematurely, allowing leaks and condensate escape. Rubber is inexpensive — using the OEM part avoids repeat callbacks.
Easy (1/5). Slip over the fitting and secure with the existing clamp; no tools beyond a nut driver for the clamp. Shut off power and gas before servicing.