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. Write at least 150 words.

The picture demonstrates the structure of a simple

water

filter and its function: providing clean drinking

water

.

Overall

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

water

, and the other to store the filtered

water

. 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

.

First,

impure

water

is poured into the tank,

then

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

.

However

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

water

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

water

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