Rainwater filtration was cumbersome and labor-intensive because of lack of rainwater specific filtration units and high maintenance requirement.

With our range of filters we resolve that issue


  • Reduced excavation to make retrofitting easier

  • Outlet water can be directly reused for gardening,flushing, etc

  • The filters are approved by most state government bodies

Raintap Pop Up Filter

Designed and Patented by IISc Bangalore

Filtration principle: Cartridge filtration

Specs: Material - HDPE (all weather proof)Single filter caters to 100 sq mt rooftop up to 1000mm rainfall

Rainy Filter

Designed and Patented by IISc Bangalore

Filtration principle: Vortex filtration

Material - HDPE (all weather proof) Single filter caters to 100 sq mt rooftop upto 1000mm rainfall. Variants available for following – 200 sq mt rooftop / 300 sq mt rooftop / 500 sq mt rooftop

Features of Raintap and Rainy Filters


Wall mounting

Simple design

Flexible to install in varying field conditions

Easy and quick installation

Easy to maintain

Strong and sturdy

First flush for relatively purer subsequent rain

Frequently Asked Questions

What is a rooftop rainwater filter and why would I need it?

It is a filter designed specifically for rooftop rainwater filtration. It consists of a filter element, which is capable of physical filtration up to 250 microns and in-built first-flush/bypass arrangement.

Rainwater filter is crucial if you intend to recharge rainwater in ground or reuse it for domestic purposes.

What are pros of rooftop filters over underground filters?

Easier to retrofit, minimum damage to existing structure, low maintenance, small footprint, first flush and bypass arrangement is easy to operate and handy. No water logging so no change of mosquito breeding.

Conventional filters are not rainwater specific and hence may not effectively filter rainwater for reuse or recharging purposes.

What are maintenance requirements and frequency of it?

Physical impurities that get accumulated on the filter cartridge need to be periodically removed and cleaned. It is a simple 15 min activity and is required to be performed 5 times in a year - once every month during monsoons (June, July, Aug, Sept) and once just before monsoons in May. Cartridge replacement is recommended every 4 years.

How many filters should I buy?

For domestic application one filter is recommended for every 1000 sq ft of rooftop area. For industrial applications Ira team needs to do the sizing exercise.

Do I need a plumber for installation?

Yes. For rooftop filters there is wall mounting brackets and inlet/outlet bypass connection, which a skilled plumber can do quickly and appropriately.

Is there a warranty on the product?

Yes.There is 1 year warranty by the manufacturer.

* FAQs are related to Raintap and Rainy Filters, write to us for any questions related to Furaat