A saddle valve is mounted directly on to a pipe which is usually 1/2 inch copper tubing. Saddle valves are self-tapping devices. Once mounted on a line, with the included rubber seal in place, all that is required is to turn the valve clockwise until it pierces the water line.
A saddle valve is mounted directly onto a pipe, usually 1/2-inch copper tubing. It's self-tapping and requires turning it clockwise until it pierces the water line after being fitted with the included rubber seal.