Aqua Plumb C3715 1/4" Turn Angle Valve With 1/2" Female Iron Pipe To Connector 3/8" Compression, specially designed to help control water supply. To install apply pipe thread tape to pipe, thread the valve onto the pipe, wrench tighten (do not over tighten), and make sure outlet is positioned correctly. Next place the compression nut and sleeve onto riser tube, and then insert tube into bottom of fitting, tighten the nut over the sleeve onto the fitting, and wrench tighten (do not over tighten). The tools needed for installation are pipe threaded tape, and a wrench.