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The Goodman 20201802 is a genuine OEM condensate drain hose tube engineered for the WGFM295115V5DAA high-efficiency gas furnace. In a 90%+ AFUE condensing furnace, the secondary heat exchanger produces liquid condensate that must be routed safely to the drain system. This tube carries that condensate from the collector box to the drain trap without leaks, kinks, or restriction.
This genuine OEM tube is molded to the exact length, diameter, and durometer specified by Goodman, ensuring a leak-free press-fit at every connection point. Generic aftermarket hose is often the wrong bore size or a softer compound that collapses under vacuum, causing drainage backups and nuisance pressure-switch lockouts. For a furnace that depends on proper condensate flow to operate, the OEM part is the reliable choice.
Easy (1/5). No tools required for the hose itself — disconnect the old tube, seat the replacement onto the fittings, and secure the clamps. Always shut off power and gas before servicing. Verify drainage after reassembly.