Make adjustments to your plants' watering needs with a twist of a knob with the Adjustable Flow Bubbler. Use the dial to control the amount of water delivered from 0 to 11.7 GPH, and range of throw from 0 to 48 in. radius (at pressures between 15-50 PSI). The 4-stream emitter releases water in a half-circle pattern. Ideal for groundcover, decorative grasses, flower and vegetable gardens, as well as trees and shrubs. Emitter is assembled on a 5 in. stake, and a built-in 1/4 in. barbed inlet connects to 1/4 in. supply tubing. Bubbler is made of polyethylene treated with UV inhibitors.