Discover how quickly your DIY drip project comes together with the Adjustable Flow Bubbler Assembly. Made for a fast, easy install, the bubbler, adjustable riser, stake, & inlet come preassembled and ready to connect. Patented Clamp N Pierce® inlet pierces supply tubing and attaches inlet at once. Fan spray bubbler emits water in a half-circle pattern at up to 24 GPH and radius of up to 13 ft. (at 15-50 PSI). Adjust the amount of water flow with the control knob. Bubbler, riser, and tubing made of polyethylene; stake and connector made of ABS; all materials treated with UV inhibitors.