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The Goodman 20201902 is a genuine OEM 23-inch condensate drain hose for the WGFM295070V4CAA 96% AFUE modulating gas furnace. Cut to the exact factory length, it carries acidic combustion condensate from the collector box to the drain trap or outlet. The pre-measured 23" length ensures the correct downward slope so condensate flows freely — critical for preventing water backup, corrosion, and pressure-switch nuisance trips in high-efficiency furnaces.
The OEM Goodman hose arrives pre-cut to 23" with the correct diameter, so it drops in without measuring or trimming. A generic length must be cut and routed manually — get the slope wrong and condensate can pool and trip the pressure switch.
Very Easy (1/5). Slip-fit hose with existing clamps. Power down, swap the tube onto both barbs, verify slope and free drainage. A 5–10 minute job with no special tools.