Aqua Culture 2-1/2 way aquarium gang valve get control over the air lines in your aquarium with the Aqua Culture 2-½ way aquarium gang valve. This valve eliminates old fashioned air line entanglements by controlling air lines directly. The anti-siphon design automatically keeps the air line above the water level to prevent water backup. This valve also features lock control so it will not be loosened by vibration or temperature change. In addition, the gang valve has an all plastic construction that prevents rust and corrosion. Upgrade your aquarium today with the Aqua Culture 2-½ way aquarium valve.