Rain Drip R155C Half Circle Stream Spray Adjustable Bubbler Half circle stream spray adjustable bubbler Allow the higher flow rates required when watering large and small plants on the same circuit Adjustable bubbler with a fan spray diameter of up to 13 feet Bubbler flow rates are adjustable from 0 to 13 GPH30 PSI for stream type, and from 0 to 24 GPH30 PSI for the fan spray