SharkBite 3/4-in PEX Crimp Brass Coupling in the PEX Pipe, Fittings & Specialty Tools department at Lowes.com
WMAXPFIT PEX Pipe Fitting 1/2 inch Set, Brass Push Fit Fitting 1/2 inch Set with 90 degree elbow, tee & coupling, push to connect for quick connection to PEX Tube Pack of 12 - Amazon.com
The Plumber's Choice 3/4 in. Brass PEX Barb x 1 in. MIP 90-Degree Elbow Pipe Fitting (5-Pack) 34105PXML - The Home Depot
ProPress Brass Plumbing 1" PEX A Expansion x P Copper Pipe and PEX Pipe Press Fitting Adapter for Residential/Commercial [10 Pack] - Amazon.com