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Outdoor Water Solutions® 3-way Selector Valve for efficient airflow between diffuser airstones and water pumps!
Air tends to go to the point of least resistance, so if one airstone is shallower than others are, or has a shorter air line, it will get the majority of the air. Selector Valves allow you to regulate the airflow. The folks at Outdoor Water Solutions use high-quality brass ball valves, which are designed to stand up to-years of use. 1/2" male fittings where polytubing attaches. Made in U.S.A.