I want to make the water scheme only one role -- 3

I want to make a complete flow chart for the water flow The region in the Arab Gulf, Saudi Arabia Below is an image showing the diagram The plan contains (7) toilets (5) Inside the villa are two (2) in the courtyard outside The first picture is the outline I want to work on The rest of the picture is just an example of what I want With a list of me, the annotated chart on the right side