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The Goodman 20201802 is a molded OEM condensate drain hose tube for the WFD195045S3BAB high-efficiency gas furnace and compatible Goodman/Amana models. This pre-formed hose routes condensate between the collector box, pressure switch, drain trap, and outlet on a condensing furnace. Because it is molded to a specific length and bend radius, it seats cleanly without kinking — which is critical, since a pinched or split drain hose causes water leaks, pressure-switch trips, and nuisance no-heat lockouts. Replace a hardened, cracked, or algae-clogged hose with the exact factory part.
The OEM hose is molded to the correct length, diameter, and routing for this furnace. Generic bulk tubing must be cut to fit and can kink, sag, or slip off the barbs — leading to leaks or false pressure-switch readings. For a condensing furnace's sensitive draft system, the OEM molded hose is the recommended choice.
Easy — DIY-friendly. Turn off the furnace, note the hose routing, slide off the old hose, and press the new hose onto the same barbed fittings. Secure any clamps and verify there are no kinks or leaks before restarting.