Our John Guest Male Elbow 1/4"x 1/4" Quick Connect uses the push-fit technology, which means that installation is quick and easy. All you have to do is push the tubing into the elbow and the quick connect fitting clamps down, making a secure fit. It's simple to connect and disconnect. These parts are food grade quality and they're to be used with water and reverse osmosis applications only. They are not to be used with gas, compressed air, or vacuum applications.