Regulate the amount of water delivered to your plants with a twist of a knob using the Adjustable Flow Bubbler. Bubbler discharges up to 11.7 GPH, with throw of up to 16 in. radius (at 15-50 PSI). Flow is adjusted by turning the head of the bubbler which acts as a dial. The 8-stream emitter releases water in a full-circle pattern. Ideal for groundcover, decorative grasses, flower and vegetable gardens, as well as trees and shrubs. Emitter is.. See full description for further details