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 flow diagram provides information

by which

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on how

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clean

water

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is procued by the dirty

water

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, highlighting the key phases from initial inputs to final outputs.

Overall

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, these steps occur in different conditions;

for instance

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, the dirty

water

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is poured into the plastic barrel,

whereas

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the clean

water

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is stored in the storage drum.

However

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, the nature of each process varies moderately. As the chart illustrates, the worker

initially

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opens the container by removing the plastic lid and pours the dirty

water

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slowly into it.

Then

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, the liquid penetrates multiple layers, which are sand, charcoal and gravel layers. After that, the

water

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stays under the barrel before rising through thin pipes.

Thereafter

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, the filtered

water

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is transported to another drum by pipes connected between barrels.

In addition

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, both containers are covered with plastic.

Finally

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, there is a tap at the bottom of the barrel, which is used to pour the clean

water

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.