A water filter is a device or system that removes impurities and pollutants from water. Water purifiers are used to improve the quality of drinking water by removing harmful substances such as bacteria, viruses, chemicals and heavy metals.

There are many different types of water filters available, including:

Activated carbon filters: These filters use activated carbon to remove impurities such as chlorine, sediments and volatile organic compounds (VOCs) from water.

Reverse osmosis filters: Reverse osmosis filters use semi-permeable membranes to remove dissolved solids, salts and other contaminants from water.

Ceramic Filters: Ceramic filters use porous ceramic materials to trap bacteria, sediment, and other impurities in the water.

UV filters: UV filters use ultraviolet light to kill bacteria and other microorganisms in water.

Ion Exchange Filters: These filters remove heavy metals and other pollutants by exchanging them with harmless ions such as sodium.

The type of water filter you choose depends on the specific contaminants you want to remove from your water, as well as your budget and the size of your home. It is important to choose filters that have been certified by an independent third party such as NSF International to ensure that they meet quality and safety standards.