Aqua Life Air Check Flow Control Switch Gang Valve 3 Way

3 outlet plastic multiple air flow valve with controlled lever.Excellent air distribution and control air flow control Valve. Help protect your aquarium against back-siphon with an effective air control and check valve solution. The 3-Way Air Control & Check Valve Combo works with freshwater and marine aquariums and can control airflow in air-driven aquarium devices including action ornaments and bubble bars.