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The Goodman 20214203 is a genuine OEM drain angle (elbow) fitting for the GKS90703BXAG high-efficiency furnace. This molded elbow redirects the condensate drain line around tight cabinet turns while maintaining an unrestricted flow path. The correct angle geometry keeps condensate moving and prevents the kinks and low spots that cause water backup, overflow, and pressure-switch trips in condensing furnaces.
The OEM angle matches the exact barb diameters and bend radius used in the GKS90 drain system, giving a press-fit seal without adapters. Generic elbows frequently mismatch the tubing size and introduce leak points. The factory fitting is inexpensive insurance against water damage.
Easy — Under 10 minutes. Power off the furnace, slide the connected hoses off the old fitting, press the new angle into place, and reconnect. No tools required.