Flair-It 1/2" PEX x 3/8" Compression Plastic Straight Stop Valve 06892 10-1017

It comes in white color & requires no special tools. Installation is easy, slide the nut along the pex pipe, rock the fitting into the pex pipe, slide the nut back along the pipe & hand tighten the nut onto the fitting. The double threaded nut will thread onto the pipe & the fitting, forming a tight seal.