Building a rainwater harvesting system in a house

October 11, 2006

Women measuring the roof areaLast week, the NGO Samvada in Yelahanka (Bangalore) put its house in the hands of 16 young people from rural areas of all Karnataka. Looking for job opportunities, they want to work on water issues. Thus Samvada, with the help of the Rainwater Club, suggested them to learn how to built a rainwater harvesting system. After mesuring the roof area (127 m²) and the size of the existing tank (8000 liters), they have implemented in the house a new PVC pipes system from the roof to the sump tank, passing through a drum sand-filter. One day work and Rs 3000 have been necessary for them to learn how building such a system for an existing house, and allow Samvada to store 90 000 liters of rainwater every year ! So when will you be ready to put such a simple but effective system in your own house ?



  1. Hell Madam/Sir
    Great to know about things happening in the rain water section. I am very much interested in having one for my house which is being consructed at Basaveswarnagar. Whom to contact and what is the telephone no.
    I am Working as Research scholar in Chemical Engg Dept in Surathkal Mangalore and visiting Bangalore for the Deepavali festival. Its better if I get the no before 18th of this month I would like to talk to him and fixup an appointment and discuss.
    Thankyou verymuch expecting your earlier reply

  2. Hello,
    I am planning to have a rain water harvesting sump for the water to be collected at the cellar.I want to know what will be the procedure for the water to get percolated in the ground. I feel this is a very good to create an awareness among the people by enouraging them to have such a one. Can u reply back on this comment.

  3. Dear shobha,
    the most efficient way we found to allow the rainwater to percolate into the ground are the recharge wells. Basically open wells three feet diameter, with a depth depending of the ground profile of the site. You can for example connect the overflow pipe from the sump tank to this well. Thanks to hydrostatic pressure, the rainwater will enter the deeper layers of the ground and hopefully reach an aquifere. It can thus help the rising of the water table level.

  4. Hello,

    – I have been trying for the past one year to install a RWH system at my home in Abbigere. I did contact you one year before at your home. But no one (plumber)has turned up to my frequent phone calls. Can you give these guys contact details? Hope this time I can succeed in installing RWH in my residence.

  5. hi sir,

    my self sandeep lalawat form udaipur, rajasthan.
    i just surffing on net and reach your link.
    i just join a ngo which name is paniram which is work for envirment . now we are planning to aware people about water saving, in this work i want your help.
    can you help me that how i make a fillter for that water harversing in low cost, so that people prefferd to join us

    waiting for your possitive reply.

    thanking you

    sandeep lalawat 09314631644 udaipur

  6. hi ,,,,,,,,,,,,,still cant get any responce form your side .

    please update me

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