Make your DIY drip project quick, easy, and stress free with the Adjustable Flow Bubbler Assembly. The bubbler, adjustable riser, stake, and inlet come preassembled and ready to install. Patented Clamp N Pierce® inlet pierces supply tubing and attaches inlet at once. The 8-stream bubbler emits water in a full-circle pattern at up to 13 GPH and radius of up to 3 ft. (at 15-50 PSI). Use the control dial to increase or decrease the output of water to your preference. Bubbler, riser, and tubing made of polyethylene; stake and connector made of ABS; all materials treated with UV inhibitors.