The diagram below shows how a simple water filter is constructed and how it functions to produce clean drinking water. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

The picture demonstrates the structure of a simple

water

Use synonyms

filter and its function: providing clean drinking

water

Use synonyms

.

Overall

Linking Words

, it is evident from the diagram that the filter is designed with two tanks, one with three different layers to effectively purify

water

Use synonyms

, and the other to store the filtered

water

Use synonyms

. A small pipe connects these containers, ensuring a smooth and efficient process. In the first container, layers of sand, charcoal, and gravel filter the polluted

water

Use synonyms

.

First,

Linking Words

impure

water

Use synonyms

is poured into the tank,

then

Linking Words

goes through the sand layer to separate all the dust and leaves. After that, the charcoal coat filters most of the bacteria in the

water

Use synonyms

.

However

Linking Words

, after filtering, some sand and charcoal dust may be left in the

water

Use synonyms

, so gravel is added to the bottom of the tank to extract them. Cleaned properly, the

water

Use synonyms

is transported to another tank through a hose for storing purposes.