If the primary purpose of the device is not to pump but to generate this intense shear, then the jet pump becomes extremely efficient and is far more effective than any other known means in the generation of fine air bubbles of air or other gas.

These fine bubbles possess a high surface area for a given bubble, and therefore are quickly and completely absorbed by the liquid up to the limit of solubility for the given temperature and pressure. Satisfaction of chemical oxygen demand (COD) can therefore be complete before the mixture leaves the pump, and of biological oxygen demand (BOD) very soon after, discharging water that is close to saturation with atmospheric gases.

The Aerator shown is a multi-barrel (or 'Jumbo') type. It is more effective to limit the size of individual aeration trains in this way; the pump is also shorter and more easily accommodated. Many aerators use a single train. If the mixture is discharged near the surface, the motive pressure for complete effectiveness can be as low as one bar. Discharge at depth necessitates an increase in motive pressure. This may be necessary if a secondary purpose of the aerator is circulation.