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Rainwater Harvesting

Do you know that Rainwater can be used to meet your daily water demand?

Kathmandu Valley receives approximately 1300-1600 millimeters of rain every year. This means that on a typical rooftop of 100 square meters more than 160,000 liters of rain is available for capture and use.

Why use Rainwater?

  • Alternate source of water during monsoon
  • Offset groundwater
  • Save money on buying tanker water
  • Help in reducing urban flooding

Process of Rainwater Harvesting

Rainwater harvesting is the process of collecting rainwater from falling on the rooftops of the building, filtering and storing it for future use. In doing so, rainwater gets managed at the source to meet the water demand.

  1. Rainwater from the roof is channeled to the RapidSand Filter, via pipes.
  2. The RapidSand Filter consists of layers of filter media and comes with an inbuilt First Flush system which flushes out the first rain containing the maximum debris.
  3. The filter media then removes the remaining dirt and debris from the rainwater.
  4. The filtered water is then diverted to the underground reserve tank via pipes and stored for future usage.
  5. This filtered water can be used for cooking and other daily utility purpose.

SmartPaani RapidSand Filters (RSF):

SmartPaani’s RapidSand Filter is a customized rainwater harvesting system. This system consists of first flush device which flushes out the first rain containing the maximum debris. This is followed by a customized rapid sand filter consisting of layers of filter media which remove the remaining dirt and debris and reduce bacteria from the rainwater. The RapidSand filter is sized according to the roof size of the building.

SmartPaani systems come in the following sizes depending on the roof size:

  • SmartPaani 200 RSF
  • SmartPaani 300 RSF
  • SmartPaani 500 RSF

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