In practice, the pump automatically starts intake due to decrease in pressure (pipe friction, intake level) only in a certain range. In this operating range, it evacuates the air from the pump independent of the suction line (for example, with initial start up operation). The pump boosts the intake performance, so that an intake level of additional 6 m can now be attained.

The charging pump unit is installed at the end of the intake line. The charging pump hangs on a float and moves up and down with the level of water in the tank. Thus water is always drawn from the cleanest area, just below the water surface.