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The Goodman 20201802 Condensate Drain Hose is a genuine OEM tube that routes acidic condensate through the drain system of the GMH951155DXAD high-efficiency furnace. Formed to the correct length and bend radius, it connects the collector box, pressure-switch ports, and drain trap so water flows freely and the air-proving circuit reads accurate pressure. Cracked, brittle, or clogged hoses cause leaks, water backup, and nuisance pressure-switch lockouts.
The OEM hose is pre-molded to the exact routing and diameter your furnace requires, so it seats securely and won't kink against nearby components. Generic tubing cut to length can restrict flow or leak at the fittings, upsetting condensate drainage and pressure-switch readings. The genuine part ensures a leak-free, correctly proven system.
A simple repair — power down the furnace, slide the clamps off the old hose, remove it, and press the new hose onto the same fittings in the original path. Ensure it isn't kinked or pinched, re-secure the clamps, prime the trap, and confirm free drainage with no leaks.