Now we will talk about the rest of the process in this post.
First Flush Pipe
- Debris, dust & dirt collect on the roof during non rainy periods when the first rain arrive.
- A first flush system arrangement is made to avoid the entering unwanted material into the Filter media & storage tank.
- This is a simple manually operated arrangement or semi-automatic system with a valve below the ‘T’ junction. --------------------------------------------------------------------------------------------------------------------
Filter Unit
- The filter unit is a container or chamber filled with filter media such as coarse sand, charcoal, coconut fibre, pebbles & gravels to remove the debris & dirt from water that enters the tank.
- The filter unit is placed over the storage tank or separately.
- It may be of Ferro cement filter unit, Aluminium, Cement rings or Plastic bucket etc.
Storage Tank
- It is used to store the water that is collected from the roof through filter.
- For small scale water storage plastic buckets, jerry cans, clay or cement jars, ceramic jars, drums may be used.
- For larger quantities of water, the system will require a bigger tank with cylindrical or rectangular or square in shape constructed with Ferro cement or cement rings or plain cement concrete or reinforced cement concrete or brick or stone etc.
- The storage tank is provided with a cover on the top to avoid the contamination of water from external sources.
- The storage tank is provided with pipe fixtures at appropriate places to draw the water to clean the tank & to dispose of extra water.
- No. of person in the House hold
- Per capita water requirement
- No. of days for which water is required
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