3/8" x 1/2" OD, Sharkbite Push To Connect Tee, Easy Way To Join Copper, CPVC Or Pex Pipe In Any Combination With No Soldering, Clamps, Unions Or Glue, Just Insert The Pipe & The Stainless Steel Teeth Bite Down & Grip Tight, While A Specially Formulated O-Ring Compresses To Create A Perfect Seal, Disassembly Is Just As Fast Using The Simple Disconnect Tool, Can Be Rotated After Assembly For Easier Installation In Tight Spaces, Certified For Potable Water Supply & Hydronic Heating Applications.