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

The above diagram displays the working mechanism of a

water

filter

. The diagram illustrates the parts that make up the vessel.

Firstly

, there are two vessels - one being the

filter

part and the other being the

storage

part. The

filter

is a plastic barrel and has four levels. The first level is covered on top by a plastic lid and it is the area where the unclean

water

is poured into. The

second,

third and fourth levels are made up of sand, charcoal and gravel respectively.

Additionally

, there are three spikes located beneath the

filter

.

Secondly

, there is a small tube that connects the

water

filter

to the

storage

drum. The tube helps in the transportation of the clean filtered

water

after it passes through the three levels.

Following

this

, the

storage

drum has a tap at the bottom which can be used by the end users to fill their glasses. Apart from the above-mentioned details, the illustration

also

maps the direction the

water

moves with the help of arrows. The

water

flows downward from the

filter

to the

storage

drum after passing through three sections of filtering.

Thus

,

this

is the process of purifying

water

.