The given picture represents the steps that make rainwater drinkable in an Australian town, including multiple actions like filtering, storaging, treating and adding of chimicals substances.
Firstly, rainfall must occur and rainwater must drain in buildings pipes, which are united in a wide one above our floor. Then, this large pipe brings water into a filter that eliminates the first unwanted elements of raw water. Later, filtered water goes down, continuing its path in a smaller pipe, and encounters a huge storage area where large amount of water is contained. After the storage phase, a horizontal pipe allows water to move in another container with same dimension as the previous one, where the water is treated with chemicals. The water is broght back up in the building trough a vertical pipe and is drunk by people using fountains. Thanks to this process the drinking water can be obtained from rainfall and the water supply problem can be solved. 
The  
given
 picture represents the steps that  
make
 rainwater drinkable in an Australian town, including multiple actions like filtering,  
storaging
, treating and adding of  
chimicals
 substances. 
Firstly
, rainfall  
must
 occur and rainwater  
must
 drain in buildings  
pipes
, which  
are united
 in a wide one above our floor. Then, this large  
pipe
 brings  
water
 into a filter that eliminates the  
first
 unwanted elements of raw  
water
. Later, filtered  
water
 goes down, continuing its path in a smaller  
pipe
, and encounters a huge storage area where large amount of  
water
  is contained
. After the storage phase, a horizontal  
pipe
  allows
  water
 to  
move
 in another container with same dimension as the previous one, where the  
water
  is treated
 with chemicals. The  
water
 is  
broght
 back up in the building trough a vertical  
pipe
 and  
is drunk
 by  
people
 using fountains. Thanks to this process the drinking  
water
 can  
be obtained
 from rainfall and the  
water
 supply problem can  
be solved
.