Orbit WaterMaster Underground 37167 Riser Flex Fitting, 1/2-Inch Male by Female by Barb Adapter 1/2-inch. male- x female-threaded x barb Spiral barbs hand-fasten to the pipe eliminating the need for glue and clamps For use with 1/2-inch riser flex pipe Made of molded high-impact plastic For outdoor use with cold water only