Big Integration / Water-saving System

In our daily life, the vast majority of sewage that can be re-used (hand and vegetable washing water etc.) has not been effectively used.On rainy days, quantity of available rainwater is wasted through the drain.This design lets drawing rain and sewage (water from washing hands, vegetable and laundry) into water tanks of buildings for flushing which accounted for a largest part. Putting the entire rainwater and sewage in buildings to be a system based on the principle of connected vessels. Once water tanks are full, they discharge water into the lower one for maximum collection, use and conservation.