Rainwater Harvesting - Commercial, Residential, Agricultural, & Industrial

Rainwater Management Specialists

Our Water Management Specialists and Engineers in Southern Africa brings a creative design approach to the escalating issue of water conservation and water treatment. We develop innovative solutions for rainwater harvesting systems and water treatment plant design. Our company was one of the first large rainwater harvesting companies in South Africa and our one knowledgeable staff have combinedexperience of over 25 years in the water business.

Why work with us?

Our company has a solid track record and have delivered successful projects throughout South Africa

Over the years we have developed extensive experience in selecting effective and reliable equipment for rainwater harvesting and water treatment systems
We have an expert engineering design team. Engineers work on each aspect of the design delivering a 3D model that can be used for procurement and installation
Our expertise and support from our local and global partners have delivered successful projects that are reliable and sustainable
In 2008 Professor Roland Schulze a world expert on water research from UKZN was asked a few questions in the Financial Mail about water security and climate change. Back then he highlighted a few...
Rainwater Harvesting means the immediate collection of rainwater running off a surface upon which it had fallen directly. Falling rainwater can provide one of the purest forms of water that is...
Using rainwater as an alternative water source has many benefits for both domestic and commercial users. Benefits range from improved water quality to reducing water and utility bills
If a rainwater system is designed and installed correctly and if the water is treated correctly it is extremely safe to drink. By implementing our design philosophy and using the correct equipment a...

All you need to know

  • Wisy underground rainwater tank

    Selecting the best rainwater tank

    Rainwater harvesting  tanks can be one of the most expensive components of a rain harvesting system, but it is probably the most important aspect of a successful installation. There are Read More
  • Residential rainwater harvesting system

    Rainwater harvesting calculator - Residential

    We get many questions about how much money will people will save with a rainwater harvesting system. We have built a calculator specific using the Durban Average mean rainfall per Read More
  • WISY 4 step system diagram

    The WISY 4 step rainwater harvesting system

    WISY AG in Germany has over many years developed  a 4 step system for effective rainwater harvesting. These fours steps can be applied in residential, commercial, agricultural and industrial rainwater Read More
  • Critical design elements

    Critical design elements

    Critical design elements for a rainwater harvesting  system If you want to design and build a rainwater harvesting system that will deliver optimum water recovery and add value to the Read More
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Flow diagrams for residential Rainwater Systems

UV steriliser installed in a rainwater harvestinfg system

How does an Ultraviolet rainwater sterilizer work?

The ultraviolet ray is a kind of invisible light wave to the naked eye. It exists on the outside of the purple ray on the spectra thus it is called the ultraviolet ray. The ultraviolet ray is subdivided in wave band A (UVA), wave band B (UVB), wave band C (UVC). The wave length of UVC is between 100nm to 280nm - and the most effective germicidal wave band is 253.7nm.

1. Principles: If you expose the water to UVC spectrum at the wave peak of 254nm for a period of time the nucleic acid, deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) of microorganisms will absorb UV rays and be damaged by the rays – thus they perish - so the water is sterilized. UV rays have a certain effect on protein and other life forms too.
2. Sterilization range: UV water sterilizer can effectively kill the algae, fungi, bacteria, rickettsia and virus to purify the water.
3. Merits of the sterilizer: UV sterilizer is a completely physical way to sterilize water. It is easy to use, cost effective , broad spectrum, does not require any chemicals, generates no secondary pollution, does not create corrosion, leaves no residue and is easy to maintain.
4. Application range: UV water sterilizer can be mounted as a pre or rear sterilization equipment with domestic or industry water purification equipment. It can be applied to various kinds of water purification.
5. For it to work effectively the water must be free of particles larger than 5 micron.