EZ-FLO's Heavy Pattern Air Gap is designed for dishwasher and disposer installation. This air gap comes with a brushed nickel cap which is a pleasant way to give the air gap style. The durable plastic is rust resistant. Simplify your plumbing and home improvement projects with the Eastman heavy-pattern air gap. Air gaps are designed to keep kitchen pipes free of dirt by preventing wastewater backflow. This 6-7/8 inch air gap is UPC approved and is best used for dishwasher and disposer installations. This air gap includes (1) brass outer cap with a brushed nickel finish, (1) rubber washer, (1) plastic inner cap, (1) nut, and (1) extension.