Transport water to plants with 3/4 in. supply tubing (0.830 in. ID X 0.940 in. OD). Connect tubing to create a main supply line or attach smaller tubing to supply tubing to add a feeder line that delivers water to a low-flow drip-watering emitter. This tubing has a heavy wall to provide extra durability. Unlike other manufacturers, NDS poly tubing is engineered in layers for durability using 100% virgin content for its outer and inner layers, with a middle layer of recycled content.