Maintain a steady flow rate as you deliver water along the entire line with the 17mm Dura Flo™ Dripline (0.560 in. ID X 0.660 in. OD). The purple dripperline can be used to identify an irrigation system using recycled water. This drip irrigation tubing features 1.0 GPH pressure-compensating (PC) emitters spaced evenly 12 in. apart. PC emitters have a constant flow rate even if the water pressure were to 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.