1/2" barb pipe tee. Riser flex fittings come in many sizes and varieties to add versatility to your sprinkler system. The fittings are durable as the flexible plastic is less likely to break on impact and the spiral barbs fasten to the riser flex pipe eliminating the need for glue and clamps. 1/2" barb tee. For use with 1/2" riser flex pipe.