"Use this 3-way brass ball valve to regulate airflow between Airstone diffusers and pumps. U.S.A. Accessory Type Guages and valves, Product Type Windmill accessory, Compatible With Airstones/water pumps, Material Type Brass, Application Regulate airflow, Includes qty. 1. Great for use with multiple Airstones or a combination of Airstones and water pumps"
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