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SIMPLE RAIN HARVESTING SYSTEM FOR RESIDENTS' HOUSES

15th. August 2010

I have just completed my very own rain harvesting project for my house on DIY basis. Thought of sharing this simple rain harvesting system for those who are interested in "Green project".

I thought it is a waste of rainwater from the roof going down to the drain. With water getting scarce due to the climate warming and change in weather patterns, we need to invest in the future.

The purpose of this project is to utilise rain water for plant watering and maybe for the washing of my cars WITHOUT having to use SYABAS treated water. The incoming treated water should be used for cooking instead.

Rainwater harvesting for floor washing, plant watering, washing hands etc. is not new as it was practised in Malaysia in 1950s and 1960s. I remember my Mum using rainwater which she collected in a concrete tank from the roof of my dad's shophouse in Malacca. She used it for floor washing etc. Unfortunately, Malaysians forgot the benefit of harvesting rain water as Malaysia developed. I have seen new houses constructed without rain gutters with the excuse of saving construction cost. Then, houses were done with low ceilings so that it can be air-conditioned and enhances electricity consumption. All these happened before the energy crunch and global warming.

Luckily, with the growing awareness of environmental matters, more people want to develop green technology etc.

Some photos here about my rain harvesting project:
http://picasaweb.google.com/tszwongkang/GreenProjects#550546559133473883...
http://picasaweb.google.com/tszwongkang/GreenProjects#550546559184155501...
http://picasaweb.google.com/tszwongkang/GreenProjects#550546559723009606...
http://picasaweb.google.com/tszwongkang/GreenProjects#550546559845268545...
http://picasaweb.google.com/tszwongkang/GreenProjects#550546559466249054...

Some facts you must bear in mind before embarking on your own rain harvesting project.
1. If there is a long drought, rain water cannot be collected in the water container as it is dependent on rain.
2. The water container MUST have a cover to prevent mosquitos from breeding.
3. As far as possible, the water container must be placed on a high ground so that gravity can be used to deliver the harvested rain water.

Hope my write up has given you some insight into a simple rain harvesting system for your own house.

TW Kang