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The Goodman 20201901 is a genuine OEM condensate drain hose for the WGFM295090V5DAB 96%+ AFUE modulating furnace. It carries acidic condensate from the secondary heat exchanger and collector box to the trap and drain, following the factory routing path. Pre-formed to length and bend, it prevents the low spots and kinks that cause standing water, pressure-switch lockouts, and intermittent no-heat calls. This is a slightly larger/longer run in the furnace's condensate circuit — replace it whenever the tubing is cracked, hardened, or fouled with scale.
The OEM Goodman hose is dimensioned for this exact furnace, seating on the factory barbs and clearing internal components without splicing. Generic tubing requires field measuring and can crimp on tight bends. Choose OEM for a guaranteed drop-in fit.
Rating: Easy (1/5). Shut off power, slide the old hose off its fittings, install the new one, and reseat any retaining clip. About 10 minutes, no tools required. Verify continuous downhill drainage after install.