Count on a steady flow of water delivered along the entire line with the 17mm Dura Flo™ Dripline (0.560 in. ID X 0.660 in. OD). Also known as a dripperline, this drip irrigation tubing features 0.5 GPH pressure-compensating (PC) emitters evenly spaced 12 in. apart. PC emitters have a constant flow rate should the water pressure change. The emitters have a turbulent flow design which flushes out sediments that can lead to clogging. Tubing is made of polyethylene, emitters are made of polyethylene and silicone, all treated with UV inhibitors.