Three-way plastic valve from KW Zone Increase the number of outlets from a single-outlet aquarium air pump using the Aqua One Gang three-way valve. You can easily split the air into 3 outlets to operate 3 air-powered devices simultaneously. Independently control the airflow for each outlet Each valve is adjustable Increase the oxygen level around the aquarium. All you need to do is connect a piece of air tubing from the air pump to the side of the Gang valve. The air stones or air-operated decorations will connect to the top of the Gang valve using an additional piece of air tubing. You can rotate the knobs on the Gang valve to adjust the flow individually for each outlet.