Frequently Asked Questions - All FAQs

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Give details about the types and costs of systems

The cost for a system is not fixed. It depends on what type of system you want to install as each system has different designs.

Here are some rough guideline

  1. A basic system with just a 2500l tank and a tap will cost about R6000 to install
  2. A 5000l tank with a rainwater filter with a pump will ocst you about R15000
  3. Potable rainwater systems that recover sufficient rainwater and purify it to replace municpal water can cost between R50000 and R75000
  4. More complex systems will be greater that R75000.
  5. Big industrial systems that recover water off surfaces in excess of 2000sqm need to be designed and costed

The final cost thus depend on each individual owners requirements


Answers questions  on the cost of water

Each Municipality charges different tarrifs

See explanation here at this link

See an example spreadheet to calculate the cost of water for Durban Municiplaity

Answers Rainwater harvesting design questions

Yes you can. You can buy the equioment form our online shop - See this link

We will also provide you with design advise to ensure effcetive installation

Yes you can but it is not good practice.

You have to filter out all the debris and leaves in your gutter and prevent it from entering the rainwater tank. High loads of organic material affects the quality (smell and taste) of the water in the tank.

We recommend that you install a primary rainwater filter.

Vortex and inline filters are very good as they are selfleaning and prevent any debris greater than 0.28 - 0.44 from entering the rainwater tank

The sedimentation inside tanks can never really be stopped, It can only be minimised and then managed.
The way we minimise it is:
- fit good primary filters. The ones we use filter down to 0.28mm. (WISY)
- fit a first flush system. It discards the first lot of water that has picked up all the settled dust and other muck on the roof. (This requires infrequent but regular cleaning)
- fit a calming inflow in the bottom of the tank(this can be considered a diffuser), to prevent turbulent inflow from unsettling the sediment/bio layer that inevitably forms on the bottom of the tank.
- fit a floating suction that draws the older, cleaner, top layer of water first.

If you follow these steps your rainwater tank will remain clean for many years without the need to clean and service it

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