Sharkbite, 1/2" x 1/4", Push Fit Reducer Coupling, Allows You To Make A Connection From 1/2" Pipe & Reduce Down To A 1/4" Pipe, 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 So Fittings & Valves Can Be Easily Changed & Reused.