A method and apparatus for directing a flow of a fluid. The apparatus comprises a housing, an inlet port, a first outlet port, a second outlet port, and a moveable barrier. The housing has a chamber inside of the housing. The inlet port is in communication with the chamber. The first outlet port and the second outlet port are also in communication with the chamber. The moveable barrier is located in the chamber and rotatable about an axis between a closed position and an open position. The moveable barrier covers the second outlet port in the closed position. The open position allows a fluid to flow through the chamber and out of the second outlet port. The closed position reduces a flow of the fluid through the chamber and out of the second outlet port.