Rainwater Harvesting
by computerwiz on Feb.02, 2010, under Computer Wiz - Blog
Rainwater Harvesting is the gathering, or storing of rainwater .
Rainwater harvesting has been used to provide drinking water for humans, animals and irrigation. Rainwater collected from the roofs of houses can make an important contribution to drinking water. In some cases, rainwater may be the only available, or economical, water source.
Rainwater systems are simple to construct. Roof rainwater is usually of good quality and does not require treatment before consumption. Rainfall catchment systems are appropriate in areas with an average rainfall of more than 200mm per year.
There are a number of types of systems to harvest rainwater ranging from very simple to the complex industrial systems. Generally, rainwater is either harvested from the ground or from a roof. The rate at which water can be collected from either system is dependent on the plan area of the system, its efficiency, and the intensity of rainfall.
Roof catchment systems
Roof catchment systems channel rainwater that falls onto a roof via a system of gutters and pipes. Roof gutters should have sufficient incline to avoid standing water. They must be strong enough, and large enough to carry the water flow. Storage tanks should be covered to prevent mosquito breeding and to reduce any contamination that may occur due to leaves or other foreign bodies entering your tanks. Rainwater harvesting systems require regular maintenance and cleaning to keep the system hygienic and in good working order.
Technical requirements for your setup
You can use expensive electronic modules and valves to control the switching between your water in the tanks and or the municipal supply or use inexpensive shut-off valves as I have in my situation.
Use at least two different methods to filter and stop any debris from entering your water tanks and finally install a third filtration system which includes a carbon canister which removes heavy metals and this is only on your outlet situated inside your home just for drinking.
My suggestion is not to install any osmosis system.
Finally you need the pump that provides the pressure and feed into your home.
Cost
My suggestion is that you look at the long term situation related to the quality of our water in say five to ten years from now.
The enjoyment of the project, not to mention how impressed your friends and family may be knowing that you are making a difference in trying to harvest your rainwater for drinking and or any other purpose you intend using this precious commodity that is freely available.
Use this project as an investment for the feature.
A 5000 litre tank could ranges from R2500-R3500 based on where you source your tank from.
Viewing of installed project
Should you require viewing of the project, please contact
Reg Fridey
Tel: 0861114731
Cell:0845858885
email: sales@computerwiz.co.za

December 31st, 2010 on 11:18 am
hi
could you tell me the approx price of a system similiar to what you have reg? (rainwater harvester)
regards
george
0832352406
October 14th, 2011 on 9:05 pm
Hi George..this reply might well be late and return on investment may be huge but the satisfaction of knowing my water is good and free of any chlorine and other contaminants.
Pricing at +/- R25000. I went big and even have solid reinforced concrete bases for my tanks…if you have the Roto tanks you dont really need to reinforce so – R8000.
4x5000litre Tanks +/- R2500 each =R10000
filters +/- R 2000, carbon and sediment filter to seperate tap in house for drinking, no osmosis needed.
piping based on your layout and not mine +/- R1000.
1 x pump to pump water into your house @ R 1200.
Total +/- R15 000
Reg Fridey
0861114731