Rainwater Filters are a specialized, high-capacity physical filters, which typically works without any external energy source, and are customized to filter (downpour) Rainwater.

1^st generation Rainwater Filters

Traditionally used filters which are slightly modified.

1. Achieves filtration up to 500 microns. Irregular/varying sieve sizes seen (effectively large hole is counted).
2. Wastes to be manually removed after each Rain. Yearly replacing the filtering unit
3. Leaves, flowers, Hairs etc removed

Eg: Sand filter, Gunny cloth filter etc

2^nd generation Rainwater Filters

Architectural changes and the Piping revolution changed the landscape of RWH. RWF specific to pipes became a norm. All the Waters falling on the catchments are directed towards the downpour pipe and the customized filters do the job of filtration.

1. Achieves filtration up to 200 microns. Irregular/varying sieve sizes seen.
2. Wastes to be manually removed after few Rains
3. Insects are removed too
4. Semi-automatic filters are available but the volume of filtered water you’ll receive is not >75%.

3^rd generation Rainwater Filters

With growing water scarcity and the recognition of RWH importance, need for domestic usability of harvested water becomes a need of the hour. While the air pollution keeps on increasing, even the remotest village is not spared of increasing AQI. So, to achieve usability of Rainwater the potential allergens that might be present, like Pollen grains, carbon particulates, dust, eggs of mosquitos etc should be removed too. Also, Maintenance of filters became an issue in the long run, hindering the success stories of Rainwater harvesting.  3^rd gen filters solved those issues by reducing sieve sizes up to 250% and also came up with a truly no maintenance features, for easy adoptability.

1. Achieves filtration up to 75 microns. Irregular/varying sieve sizes seen.
2. No maintenance of filters are required
3. Pollen grains, carbon particulates, dust, eggs of mosquitos/insects etc. So most of the allergens present in Rainwater are filtered out.
4. Volume of filtered water received is >85% and can be controlled.

So to conclude, remember to look for following things while selecting the best filter

• Filtration upto?
• No Maintainability feature
• Water output availability
• Others features including light weightedness, easy installation at any site, pipe-mounting features etc.

Compare DROPS Rainwater filter with others in the Market, and know it yourself…