Farmers Review Africa July/Aug 2017 Farmers Review Africa July/Aug 2017 | Page 64
Supplement Borehole casing & screens
Borehole casing & screens
Water is an essential commodity that is very Boreholes are drilled to be fully functioning for a corrosion, have sufficient strength to resist
useful in our life as long as we live, but the very long time – oen longer than our own collapse, be easily developed and prevent sand
commodity today cannot come as easy as of lifetimes. at oen means the lowest up front pumping
those days when we use to have streams and cost is not always the most cost effective route, Contributors
spring water in our local communities and even par tic ularly if constr uc tion quality is if we still have them they may have been polluted overlooked in a bid to save money.
making it impossible for us to have good and
quality safe water to drink.
1. WTPI (Water Technology Plastic Industries)
WTPI is one of the largest manufacturers of PVC
To keep loose sand and gravel from collapsing Borehole Casings and Screens in the African
into the borehole, it is necessary to use well Continent.
Borehole design is extremely important; both for casing and screen. e screen supports the
ensuring the sustainability of groundwater and borehole walls while allowing water to enter the
Founded in 1997 and situated in Randburg South
also to make sure the installation creates a cost well; unslotted casing is placed above the screen Africa, WTPI supplies PVC products in all forms,
effective method of obtaining water for the end to keep the rest of the borehole open and serve as extensively covering all aspects of water supply
user. a housing for pumping equipment. Since the and the movement of water.
Sadly, borehole design and construction is one of well screen is the most important single factor WTPI works with all consultants, consulting
the most overlooked aspects within the industry affecting the efficiency of a well, it is sometimes engineers and designers who are actively involved
and not enough time, care or attention is put into called the "heart of the well"!
this stage of the process and it is actually the most
vital point.
July - August 2017
in specifying systems to end users - this way the
clients are assured that what is speci ed is suitable
Well screens should have as large a percentage of for the project intended.
non-clogging slots as possible, be resistant to We have an extensive client base within South
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