Collection procedures:impurity separation → primary rain discharge → filtration → rainwater collection → rainwater storage → water supply as per different quality levels.
1. impurity separation: After being collected at the rooftop, the rainwater will run downwards through the rainspout together with big impurities like leaves and tresses, which will be separated by filtering net, and the rainwater will enter the collector.
2. Primary rain discharge: As an outdoor location, the rooftop is subject to pollution. The rain that washes away the dust, dissoluble & indissoluble impurities on the rooftop is called primary rain, and should be discharged away directed.
3. Rainwater collection as per different quality levels: As the rain continues to fall down, the rainwater will go through the driver-free filter and reach the 1st collector. During this process, rainwater is filtered, the impurities with a diameter over 2mm are separated, and the rainwater in the 1st collector can be used to water flowers and wash the ground; the water entering 2nd collector can be used for domestic use, for example, toilet flushing, bathing, clothes washing, etc.; the water entering storing container can be supplied directly as drinking water if being sterilized or boiled.



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