Copperloc 901R, 3/4" Copper x 1/2" Copper, Reducer Coupling With Stop, Fittings Provide A Clean & Easy Joining Method That's Designed To Save Time & Money On Installations, Installing A Joint Is Simple, Requires No Extra Materials For Copper & CPVC Tubing Installations & A Tube Liner For Pex Installations, No More Solder, Flux, Heat Or Special Pressing Tools Needed, Results In Lower Costs, Reduced Labor Time & A Clean & Efficient Installation Process.