Each kit contains a unique ‘Self-Tapping Valve’. C15 kit also comes with all the fittings necessary for installations with copper or plastic tubing. 15 ft. of 1/4 in. copper tubing included.Installs quickly and easilyWater lines do not have to be drainedWater does not have to be shut offCan be installed under any sink, or from any branch line Proposition 65 Information WARNING: No