We carry the John Guest 3/8" QC X 3/8" Male Elbow, quick connection makes it fast and easy to install. Should you need to simplify your water line, these quick connect push-it features are great to get the tubing in quickly, or if you need to disconnect it, easy to remove and replace. John Guest parts are made from a food grade quality plastic and is smart choice to add to any reverse osmosis water line. John Guest parts are for water only, they're not for compressed air, gas, or vacuum lines.