A water purifier is a device that removes impurities and contaminants from water to make it safe and clean to drink. Water purifiers use a variety of technologies to purify water, including:

Reverse Osmosis (RO) Technology: Reverse Osmosis (RO) technology: Reverse Osmosis water purifier use a semi-permeable material to remove impurities, salts, and other contaminants from the water.

Ultrafiltration (UF) technology: Ultrafiltration water filters use hollow fiber membranes to remove bacteria, viruses and other contaminants from the water.

Ultraviolet (UV) Technology: The ultraviolet water filter uses ultraviolet light to kill bacteria and other organisms in the water.

Activated Carbon Technology: Activated carbon filters are used in many water filters to remove impurities such as chlorine, sediment and volatile organic compounds (VOCs) from the water.

Distillation technology: Distillation purification devices use heat to evaporate water, and then condense the steam to remove impurities.

When choosing a water filter, it's important to consider the specific bacteria you want to eliminate, your family size, and your budget. Look for purifiers certified by an independent third-party organization, such as NSF International, to ensure they meet safety and security standards. It's also important to maintain your water filter regularly to make sure it's still working properly.