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The Goodman 20201802 is a genuine OEM condensate drain hose (tube) that carries acidic condensate between the secondary heat exchanger, the collector box, and the drain trap on the WGFM195070S4CAB 95% AFUE, 70,000 BTU gas furnace. Condensing-furnace hoses become brittle and develop pinhole cracks over time, causing water leaks, cabinet corrosion, and pressure-switch faults. Replacing worn hoses during any drain-system service keeps the condensate path sealed and draining freely.
This OEM hose is pre-cut to the correct length with the exact inner diameter to seat tightly on your furnace's barb fittings. Generic tubing can be substituted but must match the ID precisely and be trimmed to length; a loose or kinked aftermarket hose leaks or restricts flow. For a leak-free, no-guesswork repair, OEM is the easy choice.
Power down the furnace, pull the old hose off its barbs, and press the new hose fully onto both fittings until seated. No tools required beyond a nut driver if a clamp is used. A 5–10 minute job. Run the furnace and confirm condensate flows to the trap without dripping.