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 how a simple

water

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-filter system is used to turn dirty

water

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into clean drinking

water

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.

Overall

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, the

process

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involves several stages in which dirty

water

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is filtered through different layers inside large containers before being stored as clean

water

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. At the beginning of the

process

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, dirty

water

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is poured into a plastic barrel, after which it is covered with a lid to prevent contamination. The

water

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then

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flows downward through several filtering layers, which are made of sand, charcoal and gravel. Each layer is designed to remove inpurities in order to ensure that the

water

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becomes progressively cleaner.

Next,

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the filtered

water

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reaches the bottom of the barrel, from which it is directed through a pipe to another container. The

process

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continues with the transfer of

water

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into a storage drum, where it is collected for

further

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use. One the

water

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has been fully filtered, it is stored safely inside the drum so that it can be used for drinking purposes.

Finally

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, at the final stage of the

process

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, clean

water

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is taken from the storage drum through a tap, at which point it is ready for consumption.