Dewatering methods

Most common techniques to dewater

There is a wide variety of methods used to control groundwater during an excavation. Selecting the right dewatering method is a critical step in almost any construction project. Every job and its conditions vary and therefore must be carefully assessed. We benefit from over 140 years of tests in every possible circumstance and can help you not only choosing the best pump for the job but also make plans for their most cost-effective use.

XJ drainage pump construction site pit dewatering

Main dewatering methods


In wellpoint dewatering wells are drilled around the excavation area and submersible pumps are installed into the wells. The pumps in the wells are connected to a header pipe and the groundwater is drawn by the pumps into the wellpoints through the header pipe and discharged.

Eductor wells

In deepwell dewatering, one or several individual wells are drilled, and a submersible pump is placed in each shaft. Deepwell dewatering is best suited for deep excavations where large water volumes need to be discharged.

Bypass dewatering

During for example maintenance of sewer lines, the sewage flow is pumped around the pipe that is being repaired using suitable dewatering pumps. The pumps are installed upstream of the maintained pipe. Bypass dewatering is also common in irrigation- and construction projects.

Flood control

Stormwater and heavy rainfall create large amounts of water that needs to be removed. Pumps that can move high flows of water against low head are needed.

Tunneling dewatering

A tunnel construction is a complex worksite were many different variables need to be taken into consideration, flooding is one of them. There are many different dewatering solutions that can be needed which for all of them, we can provide.

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