A jet pump has four basic components. The nozzle converts the energy of the higher pressure fluid to kinetic energy. It should be designed to achieve a maximum velocity with the least total energy loss. The inlet section of the mixing chamber funnels the suction fluid into the mixing chamber while minimizing the energy loss of the suction fluid. The mixing chamber allows a turbulent mixing and transfer of momentum between the two fluids. It should be long enough and of a sufficiently sma11 diameter to insure nearly complete mixing, but short enough and of a sufficiently large diameter to minimize friction losses. The diffusor section is designed to reduce the flow velocity of the combined fluids through a gradua1 area expansion in order to convert the kinetic energy back to pressure head. The expansion should be gradual enough that the moving fluid does not separate from the walls, which would result in considerable energy dissipating turbulence.