Editors 03:51 PM, June 23rd, 2009

Information to help in setting a RWH system in your home or neighbourhood.

Editors 03:52 PM, June 23rd, 2009

Implementing RWH in existing dwellings can be done ensuring minimum disruption to the home’s structures. Retrofitting RWH need not involve any re-roofing or major works, and for new constructions, RWH can be integrated into the design plans.
All houses already have pipes to drain the rainwater from the terrace areas. These down-take pipes will be attached to additional piping that leads the rainwater through a filter and then into a storage tank such as an existing sump or a new rain barrel. In the case of rain barrel storage, a platform will be built on which the barrel can rest so that buckets or other water-gathering vessels can fit beneath the tap at the bottom of the barrel.

WHAT IS A FILTER?
There are two aspects of filtration. The rain falling on a terrace during the first few minutes is stored in a chamber called the first rain separator because that water typically carries with the dust and organic matter that gathered on the terrace after the previous rainfalls. Once the first rain separator fills, the additional rainwater is passed through a filter cased in PVC plastic or Ferro cement. The filter contains layers of media, which can include graded metal, sand/gravel, plastic mesh and and/or charcoal to remove organic matter, physical impurities and smell if any. The appearance and contents of the filter can be customized in depending on site conditions.

HOW TO MAINTAIN THE TWH SYSTEM?
• Once after each rain or two, open the by-valve or end-cap the first rain separator to let out the water collected from the first few minutes of rain. This water tends to be dirty and is not suitable for consumption, which is why it is collected in a separate chamber and not allowed into any storage structure.
• Rinse the sand/gravel and jelly stone that make up the filter media once every 6 months.
• Replace the filter media once in two years.

HOW IS THE WATER STORED?
Storage in an existing sump is preferable when you want to use rainwater for drinking and cooking. The plumbing to direct filtered rainwater into a sump is relatively simple and unobtrusive, and the overall system is less expensive than building a new storage structure.
If you do not want to drink rainwater or if the site conditions don’t permit, rainwater can be stored in a rain barrel and used for secondary uses like washing, gardening and other purposes.
Read more at: http://bangalore.citizenmatters.in/articles/view/587-rwh-guide-

Vaishnavi Vittal 09:46 AM, June 26th, 2009

You can contact any of the following companies for more information on RWH:
Karnataka State Council for Science & Technoloy, IISc, Malleshwaram, Bangalore 12, Ph: 23341652, www.kscst.org
Biome Environment Solutions, 1022, 6th block, 1st floor, HMT layout, Vidyaranyapura main road, Vidyaranyapura Ph: 41672790 contact@biome-solutions.com
Green Technologies, No 56, 5th cross, 10th Main, 4th Phase, 7th Block, Banashankari, Ph: 26696905, 9448571861 greentech@gmail.com
Welfare Harvesters India, No 56, 10th main road, 7th block, 4th phase, BSK 3rd stage, Ph: 9611132327, 9611132328 info@welfareharvesters.com , www.welfareharvesters.com

You can also read about the current status of RWH in Bangalore at http://bangalore.citizenmatters.in/articles/view/1160-monsoon-rwh-bengaluru-situation

Satheesh Amilineni 11:48 AM, December 19th, 2011

Contact me (samiline@gmail.com) for any free help you need on RWH.

Useman 02:10 PM, April 23rd, 2012

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