HUB Parts › Rinser Drain Fitting Image 1 of 2 Image 2 of 2 Rinser Drain Fitting $10.50 This fitting connects the rinser to the HUB drain tubing.Finger friendly wing nut means no tools are required to tighten. Add To Cart Added! This fitting connects the rinser to the HUB drain tubing.Finger friendly wing nut means no tools are required to tighten.