A wellpoint dewatering system consists of a series of shallow wells, known as wellpoints, which are installed at a pre-determined depth and appropriate spacing around an excavation.
The wellpoints are connected to the surface, via a riser pipe, and in turn, connected to a common header main pipe through a flexbow.
This flexbow incorporates an adjustable pushfit valve which allows the control of air and water entering the system, known as trimming, to give a clear view of what is being pumped.
The header main pipe is connected to a wellpoint dewatering pump and then discharged to the designated point.
SLD’s Wellpoint Dewatering Systems are extremely versatile and can be used for a wide range of applications.
They can be used to lower and control groundwater levels in excavations, in order to create a dry and stable working environment, and are also suitable for shallow foundations and trench works. SLD’s Wellpoint Dewatering Systems have the ability to deal with very low flows in silty sands to much larger flows in coarse sands and gravel.
Where excavations are too deep for a single stage wellpoint dewatering system, SLD Pumps and Power offer a multi stage rental solution.