Rainwtarer tank 15000l system

Typical Rainwater Harvesting system costs.

There are many factors that influence the cost of a rainwater harvesting system. Generally it is cheaper and more cost effective to design and install a system when constructing a new building. Many of the costs like rainwater attenuations and stormwater retention systems can be offset against the installtion of a rainwater harvesting system. 

Each installation is unique but here are some guideline costs for design and installation.


The systems  below makes use of basic components but will contain all the required equipment to provide safe and reliable  drinking water for a household

Deluxe systems. This system can recover water off a roof of 200sqm and convert it o potable water - basically substituting municipal water with purified rainwater. 

  • A basic above ground storage system with basic componenets will cost about R40 000 to R55 000 installed and tested
  • A system with undergorund tanks will cost in the region of R120 000 to R170000 installed. Underground rainwater tanks are expensive and require a big portion of civil work 

 Underground Concrete tank 1

A basic 5000 litre above ground system where water will be recoved of a 150sqm roof and the water used for general washing, flushing of toilets, doing the washing and general non potable applications will cost you between R15000 and R20000 installed. It is a pressurised system in which the pump  swithes on an off depending on the water demand 

10000l rainwater harvesting installation with submersible pump


Many commercai installation have unique requiremenst and hence it is more difficult to to give a rough estimate of costs.

Our experience has shonw that above ground systems with storge of 20000 liters can be as low as R90000 and as much as R250000 if underground tanks are installed 


 underground ecorain tank



These systems range from R15000 to R35000 depending on the size of the tank storage and irigation flow volume requirements. 


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