Orbit WaterMaster Underground 37168 Riser Flex Fitting, 3/4-Inch Male by 1/2-Inch Barb Elbow, 10-Pack Sharp spiral barbs permit hand insertion and eliminates the need for clamps or glue Molded, high-impact, plastic construction for long life For use with 1/2-inch riser flex pipe Durable construction provides years of reliable use For outdoor use with cold water only