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The Goodman 10254303 is an OEM flexible rubber coupling used in the WGFM195090S5DAC gas furnace to join drain, condensate, or vent tubing with a leak-tight, vibration-tolerant seal. Rubber couplings harden, crack, and lose their seal over years of thermal cycling and condensate exposure, leading to drips and pressure-switch faults. Replacing this small part restores a clean seal and prevents water damage around the furnace base.
The genuine Goodman coupling is sized to the exact inner and outer diameters of your furnace's tubing, so it seats without leaks or over-stretching. Off-the-shelf couplings in the wrong bore can weep condensate or trip the pressure switch. At this price point, the OEM part is inexpensive insurance.
Easy — Loosen or slide off the retaining clamps, remove the old coupling, and press the replacement onto the tubing before re-securing. No tools beyond a nut driver or pliers are typically required. Confirm the drain flows freely after install.