Frequently Asked Questions
Straight answers about boreholes, wellpoints and water filtration — from the team that’s been drilling and installing across Cape Town for over 30 years.
A borehole is the general term for any narrow shaft drilled in the ground. Typically, a borehole used as a well is completed by installing a vertical pipe (casing) and well screen to keep the borehole from collapsing. This also helps prevent surface contaminants from entering the borehole and protects any installed pump from drawing in sand and sediment. When completed this way, the borehole is more commonly called a well. Boreholes can be drilled up to 300 metres.
A wellpoint is a small-diameter, closely-spaced shallow well, which offers a highly economic and versatile method of groundwater control where drawdown requirements on site are less than 5–6 metres in depth.
Filtration is the process in which solid particles in a liquid or gaseous fluid are removed by the use of a filter medium that allows the fluid to pass through while retaining the solid particles. Filtration may mean the use of a physical barrier, chemical, and/or a biological process. Removal of particles takes place through straining, flocculation, sedimentation and surface capture.
A wellpoint is a polyethylene pipe with a filtered end installed into a porous soil structure. The water is distributed by means of a surface-mounted centrifugal pump. A borehole is a shaft drilled to depths exceeding 20 metres with a large-diameter casing allowing for the installation of a submersible pump to distribute the water.
A wellpoint installation takes approximately 2–4 hours, whereas a borehole installation can take about 3–5 days.
Once the wellpoint or borehole installation has been completed and the water has been tested, we will let you know if it is suitable to fill your pool with.
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