Make changes to the water flow rate and spray range easily with the Adjustable Flow Bubbler. Featuring a convenient dial to control the water, simply turn the knob to discharge the amount of water to your preference-from the shutoff position at 0 to 21.6 GPH, and up 62 in. radius at pressures between 15-50 PSI. Water is released in a fan spray, full-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.