Rain Water Storage Systems
A practical guide to building efficient water harvesting systems for your home
Why Rainwater Harvesting?
Rainwater harvesting is one of the most practical investments you can make for your property. It reduces dependence on municipal water supplies, lowers your utility bills, and provides a reliable backup water source during droughts or emergencies.
Basic System Components
A functional rainwater collection system consists of four main components:
- Collection Surface: Your roof acts as the primary collection area
- Gutters & Downspouts: Direct water from roof to storage
- Filtration: Remove debris and contaminants
- Storage Tank: Hold water for later use
Sizing Your System
The size of your rainwater system depends on your roof area and local rainfall. A basic calculation: multiply your roof area (in square feet) by your annual rainfall (in inches), then divide by 12 to get gallons per year.
For most residential properties, a 500-1000 gallon tank provides adequate storage for garden watering and emergency use.
Installation Steps
- Clean and inspect your gutters
- Install first-flush diverter to remove initial dirty water
- Position storage tank on level ground with proper drainage
- Connect downspouts to tank inlet with filtration screen
- Install overflow pipe and outlet valve
- Test system during next rainfall
Maintenance Tips
Keep your system running smoothly with regular maintenance:
- Clean gutters quarterly
- Check filters monthly during rainy season
- Drain tank completely before winter in cold climates
- Inspect tank for cracks or leaks annually
Pro Tip:
Install your tank slightly elevated (on a platform) to allow gravity-fed water flow to your garden or irrigation system, eliminating the need for pumps.