Quickly and easily connects to any 3/4 male pipe threaded (MPT) outdoor faucet, garden hose or component. Safely prevents backward flow of water from a drip irrigation system into your potable/clean drinking water supply. Stainless steel 150 mesh filter catches debris to help keep system functioning properly. Simply thread into place; take care fitting is fully tightened so rubber gasket can correctly seal assuring leak-proof performance. Constructed of highly durable UV and chemical-resistant materials to assure long life.