Rainwater tanks work by collecting stormwater runoff from rooftops and other impervious surfaces.
Rainwater Tank Functionality
Here's a breakdown of how rainwater tanks function:
- Collection: Rainwater tanks are primarily designed to capture rain that flows off impervious surfaces, like the roofs of buildings. This reduces the amount of stormwater that enters local waterways.
- Storage: The collected rainwater is then stored inside the tank until it is needed.
- Overflow Mechanism: Every rainwater tank is equipped with an overflow mechanism. Once the tank is full, excess water is redirected into the regular stormwater drainage system. This ensures the tank does not overflow and cause damage.
Key Features and Benefits
- Reduced Stormwater Runoff: By capturing rainwater, these tanks minimize the amount of stormwater that can cause erosion, pollution, and flooding in natural waterways.
- Water Conservation: Rainwater collected can be used for non-potable purposes such as watering gardens, washing cars, and flushing toilets. This helps conserve municipal water resources.
- Simple System: The basic concept of rainwater collection is straightforward, utilizing gravity to direct rainwater into the tank.
- Versatile Installation: Tanks come in various sizes and materials to fit different property types and water needs.
System Components
The key components of a typical rainwater tank system are:
| Component | Function |
|---|---|
| Roof | Surface from which rainwater is collected. |
| Gutters/Pipes | Channel water from the roof to the tank. |
| Rainwater Tank | Storage container for collected rainwater. |
| Overflow Valve | Releases excess water to the drainage system when the tank is full. |
| Optional Filters | Removes leaves and debris before water enters the tank. |
| Pump | Used to pump water from the tank to its point of use if necessary. |
In summary, rainwater tanks are a simple yet effective method for capturing and storing rainwater for later use. They also contribute to managing stormwater runoff and conserving water resources, as they collect stormwater run-off from impervious surfaces such as roofs, reducing the amount that enters our waterways. They also have an overflow mechanism meaning that once a tank is full the excess water is redirected into the stormwater drainage system.
