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The Goodman 20201901 Drain Hose Tube is a genuine OEM condensate routing component for the Amana/Goodman AMH950904CXAB high-efficiency furnace and compatible 95%+ models. It channels acidic combustion condensate from the collector box and trap assembly to the drain, keeping the burner and heat-exchanger area dry and preventing the water backups that trigger pressure-switch faults.
Because the OEM 20201901 is pre-formed to the correct length and routing for the AMH950904CXAB, it installs without kinks and maintains proper drainage slope. Substitute tubing frequently sags or pinches, allowing condensate to pool — which corrodes components and can flood the burner compartment. The genuine part protects a much more expensive furnace.
Shut off power to the furnace, release the hose clamp, pull the old tube from its fittings, and press the replacement into place. No cutting or special tools required — typically a 10–15 minute job for a homeowner.