Regulate the amount of water delivered to your plants with a twist of a knob using the Dial-a-Flo™ Adjustable Bubbler. This emitter discharges water from 0 - 20 GPH, with a throw of 0 - 50 in. radius. Flow is adjusted by turning the head of the bubbler which acts as a dial. The fan-spray emitter releases water in a full-circle pattern (360°). To install, screw the 10-32 threaded inlet into a riser and attach to a stake, with riser connected to 1/4 in. distribution tubing (A220 and A250) or 1/4 in. Dura Flo™ JR dripline. Ideal for watering groundcover, decorative grasses, flower and vegetable gardens, as well as trees and shrubs. The adjustable bubbler is made of polyethylene treated with UV inhibitors to prevent fading and cracking.