Orbit WaterMaster Underground 37153 Riser Flex Pipe, 1/2 Inch by 10-Feet Easy installation or repositioning of sprinkler heads in hard-to-reach areas Available in 18-inch 24-inch 10-feet and 50-feet lengths Construct custom swing joints Use with 1/2 in barb fittings to connect sprinkler heads Flexible polyethylene tubing