Household water filters have become one of the common appliances in modern households, used to provide clean and safe drinking water. However, water filters are not "one size fits all". There are many types of filtration systems inside them based on different functions and technologies.

Countertop water purifier is a small water purification device installed on the kitchen countertop, usually directly filtered by connecting to the faucet or water source. Its core working principle includes: pre-filtration, activated carbon filtration, ultrafiltration membrane filtration etc..