Take the guesswork out of setting up a drip system with the Adjustable Flow Bubbler Assembly. The bubbler, adjustable riser, stake, and inlet come preassembled and ready to install in minutes. Patented Clamp N Pierce® inlet pierces any standard supply tubing and attaches inlet at once. Fan spray bubbler emits water in a quarter-circle pattern at up to 24 GPH and radius of up to 13 ft. (at 15-50 PSI). Increase or decrease water flow with a twist of the dial. Bubbler, riser, and tubing made of polyethylene; stake and connector made of ABS; all materials treated with UV inhibitors.