Don't contaminate your clean dishes. Waterstone Contemporary Dual Port Air Gap prevents dirty drain water from the dishwasher from backing up into your water system. An ideal solution for a kitchen with two dishwashers, reverse osmosis or water softeners. Not only is the air gap unit designed to stop brine water and reduce dirt in your kitchen pipes, but will look good in the process. Modern knurling design matches all Industrial PLP Pulldown Faucet Suites. Includes air gap body and cover. American made and comes with a lifetime functional warranty.