Antelco has the original Shrubbler with flow adjustment. This adjustable stream emitter allows you to control the flow and coverage simply by twisting the cap. With 22 clicks for fine tuning just the right flow, you can use this durable emitter in a variety of landscape designs. The 1/2" FPT connection makes mounting on top of risers a breeze.Features: Finger-tip click flow control; Flow from fully closed to fully open is 0 - 13 GPH; Coverage Area 180° radius up to 2 feet; 360° diameter is up to 3 feet; ; Operating Pressure Range is 15 - 30 PSI ;