Transition from a PVC main water line to sprinklers with ease using 1/2 in. Super Flexee™ Swing Riser Pipe (0.490 in. ID X 0.690 in. OD). Connect one end to the main supply line using a slip fitting to secure it to the PVC pipe. Attach the other end to the sprinkler to system. 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.