The diagram below shows a simple system that turns dirty water into clean water. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

The diagram illustrates not only several features of a water-filter assembly but

also

the process of how drinkable beverage is produced.

It is clear that

there are 4 key stages involved in

this

process, beginning with unclean liquid being poured into the filtering system and ending with the final product as drinkable water. As can be seen, the system comprises two containers. The first one is a plastic barrel with a plastic lid covering the top and three layers of materials which are sand, charcoal

together with

gravel used to purify the liquid.

Moreover

, There is a storage drum which is connected to the second tank by a pipe located at the bottom to deliver treated drinks. Regarding the operation, during the first step, dirty water is poured into the former container and purified by the three filtering materials inside.

Next,

purified drinks are pumped to the latter storage barrel through the pipe.

Finally

, a tap is installed for consumers to get drinking water.