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

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filter

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

Firstly

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, there are two vessels - one being the

filter

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part and the other being the

storage

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part. The

filter

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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

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is poured into. The

second,

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

Additionally

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, there are three spikes located beneath the

filter

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.

Secondly

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, there is a small tube that connects the

water

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filter

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to the

storage

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

water

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after it passes through the three levels.

Following

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this

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, the

storage

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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

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maps the direction the

water

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moves with the help of arrows. The

water

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flows downward from the

filter

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to the

storage

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drum after passing through three sections of filtering.

Thus

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,

this

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is the process of purifying

water

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.