C&D Valve Braze On Self Piercing Copper Saddle Valve for 3/8" OD Tube (6 Pack)

Braze-on self-piercing copper saddle valve for 3/8" tube The M Series is the first and best braze-on, self-piercing copper saddle valve. It is widely used and easily installed on a charged line. After brazing the saddle portion onto line, the steel pin with valve core penetrates the line and is locked into place simply by tightening the cap.