Install drainage around curved edges such as around patios, fountains, pools, and spas with ease using the patented Qwik-Turn™ Deep Radius Coupling. Works with the 5 in. Pro Series™ Channel Deep Profile Drain to collect surface water runoff. While creating angled turns with traditional straight channel drains require measuring, sawing, and mitering pieces together, the Qwik-Turn Coupling with tongue-and-groove ends are easy to connect into place and rotate up to six degrees horizontally while remaining locked vertically. Couplings can also connect to each other for tighter curves.