During the last few year's water restrictions in our province demanded potable water. With the expensive water rates and weather patterns, attention has increasingly focused on the necessity of this vital resource. With prices now increasing plus standing charges, your wellpoint or borehole water supply can save huge amounts of money. A properly designed borehole can pay for itself, sometimes in a matter of months. Borehole and wellpoint water supplies offer huge savings to many users, sport fields, housing schemes, farms and leisure centres. The installation of a borehole or wellpoint adds extra value to your property.
Constructing a Borehole
You have to make sure that the contractor drilling your borehole or wellpoint has experience in your area. How he drills your borehole is just as important as where it is drilled.
In the Western Cape, Rotary Mud drilling is the most used due to the ground structure. After drilling to the required depth and water is found, the boreholes is lined with PVC casing (made of plastic) or steel casing depending on the ground structure.
Special screens are slotted (screened) to allow the water through at the right pressure. These slots avoid sediment being drawn in along with the water. The thickness of the PVC (class 16 PVC) is determined by the depth of the hole. The thinner classifications is class 12 or class 9. The area around the screened PVC (annulus) is packed with gravel (grade 6) or 16/30 sand that act as a filter. The borehole is now ready to be "developed". This is done by using a compressor to blow out the chemically treated water. This proses is done until perfectly clear water appears. If the borehole is not "developed" it can have a big influence on the amount of water produced by the borehole. Steel casing is used only if a hard formation is encountered. The method of drilling will change from mud to rotary drilling to air percussion drilling. Steel sleeves are lowered down until the "rock" is struck. The air percussion drilling will proceed until water is struck. Clean and clear water is normally found in these rocks.
If it is necessary to line the hole with PVC, the PVC casing is inserted into the steel casing. The annulus between the steel and PVC is filled with gravel or 16/30 filter sand to act as a filter. The final, but very important part, is lowering a reliable stainless steel submersible pump, powered by electricity into the boreholes. The pump will bring water to the surface under pressure.
The size of the pump is determined by the flow of the water and the depth of the hole. A proper borehole for domestic purposes should deliver between 500 and 3500 litres of water per hour. Great care is taken in the way we do the engineering of the hole. We use safe, non-toxic materials within the boreholes.
Why install a perfect and high quality borehole if you don't maintain it? Prevention is better than cure. To keep your borehole at peak efficiency, and minimize the possibility of a breakdown it is recommended that the borehole and pumps are serviced on a yearly basis.
Maintenance and Rehabilitation:
We offer services to assist with the maintenance and improvement of existing installations.
- Rehabilitation of existing boreholes (cleaning with compressor)
- Removing of borehole and booster pumps
- Pump testing
- Servicing of borehole and booster pumps
- Cleaning of holding tanks
- Upgrading of existing system
Servicing and maintenance of such an expensive asset will ensure maximum lifespan of pumps and boreholes.
We have experience of working in all walks of life, farmers and companies requiring a private supply for their own production processes or for irrigation purposes. Cutting Costs Boreholes pay for themselves in a very short time. Frequently cutting costs by at least 80%.
Users such as these benefit from savings:
- Sports grounds and Golf courses
- Domestic housing with small to big gardens
- Old age villages
Pumps, Parts and Supplies
Each borehole and wellpoint requires its own specific pump and parts for optimal use.
- Submersible borehole pumps
- Wellpoint pumps
- Water Filters
- Booster pumps
- Fittings, pumps and valves
Water Storage Tanks
A water storage tank is fitted where the water pressure is not enough. Especially if you want to connect the water directly to your irrigation. Holding tanks vary in size and the size chosen will be determined after the amount of water is established from the borehole in conjunction with the quantity that is needed to irrigate. A booster pump pumps water to the irrigation system. The filling of the storage tank from the borehole is attached via a level control device. Booster pumps vary in size depending on the needs and is fitted with a dry run protection unit. It can also be connected to stand up pipes around the property to feed hoses.