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The Goodman 20201802 Drain Hose Tube is a genuine OEM condensate hose for the WGFM195070S4CAC high-efficiency gas furnace. It carries acidic condensate between the collector box, drain trap, and pressure switch ports, cut and shaped to the exact length and diameter the furnace requires. A brittle, cracked, or kinked hose causes leaks, blocked drainage, and pressure switch lockouts — this factory replacement restores a clean, sealed condensate path.
The OEM hose matches Goodman's inner diameter and length so it seats tightly on the collector box and trap barbs. Generic tubing that's the wrong size can slip off, leak, or restrict flow — leading to condensate backup and pressure faults. For a few dollars, the genuine part removes any fit guesswork.
Easy (1/5). Power off, pull the old hose from its fittings, and press the new hose fully onto each barb. Confirm there are no kinks and that condensate drains freely before returning the furnace to service.