Don’t contaminate your clean dishes. Waterstone Contemporary Single Port Air Gap prevents dirty drain water from the sink from backing up into the dishwasher. 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. Classic design matches Annapolis, Hampton and Towson Traditional Suites. Includes air gap body, cover and two accent buttons. Cover is solid brass or stainless steel construction and available in 31 finishes and stainless steel.
http://thehistoryhacker.com/2015/01/ All Waterstone kitchen faucets are designed, engineered and MADE IN THE USA.