The Curb-Stop is a mechanical in-line stopper system for use with water, gas and mechanical/industrial applications, including use on steel and copper type K and L services. Its design features a rubber-coated gate, an internal feed screw and a bolt-on fitting, and it allows for quick and simple installation. The Curb-Stop is easily installed in all piping applications in a matter of minutes. It works well in buildings, out in the field, for keyhole installations, on process piping, in emergencies and more.