Transportation :

Rainwater collected from rooftops needs to be directed to the storage or harvesting system using down-take water pipes or drains. It is recommended to use UV-resistant water pipes, such as ISI PVC pipes, with the appropriate capacity. For sloping roofs, gutters and down-take pipes can efficiently capture the water. Additionally, for terraces, each drain's opening should be equipped with wire mesh to prevent the passage of floating materials.

First Flush :

The first flush, a device employed to eliminate the initial rainfall, serves the purpose of preventing potential contaminants from the atmosphere and catchment roof from compromising the quality of storable or rechargeable water. This process is essential for cleansing accumulated silt and other debris on the roof during dry seasons. It is advisable to install a first rain separator at the outlet of each drainpipe to effectively carry out this function.

Filter :

Roof Top Rainwater Harvesting often faces skepticism due to concerns about potential groundwater contamination from rainwater. However, the likelihood of this concern becoming a reality is minimal with the adoption of a proper filter mechanism. It is crucial to ensure the integrity of underground sewer drains, preventing punctures and any nearby leakage. Filters play a vital role in treating water, efficiently removing turbidity, color, and microorganisms. Following the initial flush of rainfall, water should pass through these filters. While various types of filters are in use, their fundamental function is to purify water effectively.