Problems: Clean water is a huge problem in some regions of the world. Yet in some countries, people use clean water to flush the toilet. Why do we use clean water to flush human excrement ? it is a waste of clean water.

I cringe whenever I flush the toilet and imagine in some part of the world people will kill for the clean water that I wasted every single day. Why can't we flush with USED WATER instead?

Solution:

So here is the idea, the used water from hand wash basin and bathtub can be used to flush the toilet.

The integrated bathroom system consist of a wash basin and bathtub connected with pipe to the toilet flushing system.

After we wash our hands, brush our teeth or take a shower, the water is kept in storage and later used to flush the toilet.