Raindrip adjustable bubblers are useful when watering small and large plants on the same circuit and are often used when adapting underground sprinkler systems to micro watering. Bubblers can replace several drippers in large, round containers. Use when higher flow rates (up to 24GPH) are desired. The Full Circle Stream Spray Bubbler is mounted on a sturdy stake with a built-in barbed connector to attach to the Main Line with a 1/4" tubing line. Adjustable from 0-13 GPH @ 30 PSI - 3 ft. diameter.