Raindrip 157005B Full Circle Stream Spray Bubbler w/Barbed Inlet, 1/4"Raindrip Adjustable Bubblers are useful when watering small and large plants on the same circuit and are often used in conjunction with Raindrip Conversion Devices when adapting underground sprinkler systems to micro watering. Bubblers can replace several drippers in large, round containers. Use when higher flow rates (up to 24 GPH) are desired. Convert existing 1 2" underground sprinkler systems to low flow watering where a drip circuit cant be set