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The Goodman 20201802 is a genuine OEM condensate drain hose tube, cut and formed as a direct-fit replacement for the GMH950703BXAD high-efficiency furnace. It carries acidic condensate between the drain trap, secondary heat exchanger, and drain outlet. Over time these hoses can crack, harden, or clog — restoring the correct hose keeps condensate flowing freely and prevents leaks, water backup, and pressure-switch faults.
The OEM 20201802 comes pre-sized to Goodman's exact length and inside diameter, so it seats tightly on the factory fittings without kinking or leaking. Generic bulk tubing may not match the ID or bend radius, leading to slip-offs, restricted flow, or improper trap seal. For a few dollars, the correct OEM hose avoids nuisance water and pressure issues.
Easy (1/5). Slip the old hose off, route and press the new hose onto the fittings, and confirm a snug fit. Shut off power and gas first, clear any standing condensate, and check for free draining on startup. A straightforward DIY replacement.