Use 17mm Dura Flo™ Dripline (0.560 in. ID X 0.660 in. OD) to convey a steady flow of water along the entire length of line. This drip irrigation tubing, or dripperline, features 1.0 GPH pressure-compensating (PC) emitters spaced evenly 12 in. apart. PC emitters maintain a constant flow rate even if the water pressure changes. 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.