"Don't pay for air if you want to move water?"

It may sound like a banality, but we keep observing the water meters on construction sites not being properly installed. Especially analogue water meters count the amount of water flowing through only when the pipe is completely flooded.

In the Wellpoint-Dewatering area, however, an air-water miyture is drwan out of the ground. It is therefore particularly important to evacuate the air and pump only "pure" water through the pipes on the discharge side. Otherwise, the amount of water discharged or the efficiency of the pump cannot be measured at all.