Rainwater harvesting
Rainwater Harvesting System Design and Installation in Chennai
Collect and filter rooftop rainwater, recharge your borewell or store it for use, with a system sized for your roof, soil and building.
- Recharge pits & wells
- Rooftop collection
- Rainwater filters
- Storage tanks
Free site inspection before we quote
Make the north-east monsoon refill your groundwater
Most of Chennai's rain falls in a few weeks between October and December. Without harvesting, it runs off into storm drains while borewells in the same area dry up by summer. A well-designed system catches roof water, filters it and either recharges the ground or stores it for flushing, gardening and washing.
We consult, design and install rainwater harvesting for houses, apartments, commercial buildings and industrial sites. Every design starts with your roof area, the soil type and how you want to use the water.
What's included
Systems we design and install
Residential RWH
Recharge pits or wells and downpipe filters for independent houses and villas.
Apartments and commercial
Systems for apartment blocks, offices, malls and hospitals, with storage for reuse.
Industrial RWH
Large-roof collection, storage and recharge for factories and warehouses.
Rainwater filters
Downpipe and underground filters that remove leaves and silt before storage or recharge.
Rainwater storage tanks
Precast RCC or built-in-place tanks from 4,000 litres to 10 lakh litres.
RWH maintenance
Cleaning of catchment, gutters, filters and tanks before each monsoon.
Precast rainwater tank: sample specification
A typical 5,000 litre precast ferrocement tank we supply. Other sizes are built to order.
| Item | Detail |
|---|---|
| Capacity | 5,000 litres |
| Material | Ferrocement, M30 grade concrete |
| Size (L × W) | 2,100 mm × 1,800 mm |
| Wall and top cover | 75 mm |
| Base | 100 mm |
| Reinforcement | TMT 8 mm, two-way at 125 mm spacing |
| Load-bearing capacity | 10 tonnes |
| Built-in-place tanks | 4,000 litres to 10 lakh litres |
Tank cost depends on size, design and site location. Ask for a current quote.
Products
Rainwater filters and components we supply
Filters, collectors and siphons for rooftop rainwater systems. Ask for availability and a quote.
Filter Collector FSA downpipe filter that cleans rainwater from one roof downpipe and sends it to…
Garden Rainwater CollectorA downpipe collector that filters roof water into a rain barrel for garden use…
LineAr 100 Rainwater FilterAn inline rainwater filter for DN 100 pipework that cleans roof runoff before it…
MultisiphonAn overflow siphon for DN 100 tank overflows that skims floating debris off the…
Overflow Siphon DN 200A large DN 200 polyethylene overflow siphon for big rainwater storage tanks, designed to…
Rain Collector RSA UV-resistant downpipe filter for 100–110 mm pipes that sends clean roof water to…
Smoothing Inlet for RainwaterA stainless-steel inlet fitted at the bottom of the tank that brings in filtered…
Standpipe Filter Collector STFSA filter collector that replaces the bottom section of a downpipe, filtering roof water…
Suction FilterA stainless-steel filter fitted on the pump intake inside the storage tank, protecting the…
WFF 100 / 150 Process and Rainwater FilterUnderground vortex fine filters for horizontal rainwater pipes, cleaning runoff from medium and large…
WFF 300 Process and Rainwater FilterA high-capacity vortex filter for large commercial and industrial roofs, cleaning rainwater in the…How it works
From your first call to a finished job
- Call, WhatsApp or send the formTell us what's wrong or what you're planning. Photos help.
- Site visitWe inspect, measure and listen to what you need.
- Itemised quoteMaterials and labour listed separately, before any work starts.
- Work, test and hand overOur team does the job, tests it and leaves the site clean.
FAQs
Rainwater harvesting: common questions
Can't find your answer? Ask us directly. We're happy to explain before you decide.
Can water be collected from any roof?
Most roofs work. Smooth, non-absorbent surfaces such as concrete with a good finish or tiles give the best yield. Flat roofs collect slightly less because of puddling and evaporation, and need clean outlets.
Is harvested rainwater safe to use?
Filtered roof water stored in a clean, covered tank is suitable for flushing, washing, gardening and car washing. For drinking it needs further treatment and testing.
Should I recharge the borewell or store the water?
If your borewell yield drops in summer, recharge helps. If you buy tanker water, storage gives a direct saving. Many sites do both: store first, overflow to recharge.
How much maintenance does a system need?
Clean the gutters and filters before the monsoon and every few months during the rains. Recharge pits need desilting about once a year.
What does a rainwater harvesting system cost?
It depends on the roof area, the type of system (recharge pit, well or storage tank) and site conditions. We quote after measuring the roof and checking the soil.
Do you also supply rainwater filters?
Yes. We supply and install downpipe filters, filter collectors, overflow siphons and suction filters. See the products listed on this page.
Can an existing building add rainwater harvesting?
Yes. Most houses and apartments can be retrofitted by connecting existing downpipes to a filter and a recharge pit or tank.
Rainwater harvesting
Get a free quote
Tell us about the job and we'll call you back to arrange a site visit and an itemised quote.
What happens next
- We call you back to understand the job.
- We visit at a time that suits you.
- You get an itemised quote before any work starts.
Prefer to talk now? Call or WhatsApp us.