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The Goodman 20201902 23-inch Drain Hose Tube is a genuine OEM condensate line pre-cut to length for the WGFM195090S5DAB high-efficiency gas furnace. On condensing furnaces, reliable removal of acidic condensate is essential to protect the secondary heat exchanger and keep the pressure-switch circuit satisfied. This 23-inch factory hose is sized and shaped for a clean, sloped run to the trap or drain.
OEM vs. Generic: The 23" OEM length is specified so the hose reaches the trap without excess slack that would sag and hold water. Cutting generic tubing to guess the length often leaves loops that pool condensate and cause intermittent no-heat faults. The genuine 20201902 removes that guesswork with a correct, ready-to-install fit.
Install Difficulty: Easy. Shut off furnace power, pull the old hose from its barbed ports and clips, then push the new 23-inch hose onto the same fittings — about 10 minutes, no tools required. Confirm a continuous downward slope and pour water through to verify free drainage before restoring power.