3/4" x 1" Female Nominal Pipe Thread Push Fit Connector, Easiest Way To Joint 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 Tights, While A Specially Formulated O-Ring Compresses To Create A Perfect Seal.