What is the difference between a pre-filter, water purifier and water softener?

Pre-filter: It can filter large particles of municipal water supply debris and secondary pollution, including rust, sediment, algae, etc.. Mainly for water heaters, pipelines, etc. to play a protective role, the filtered water can be used for domestic water, but not directly drinkable. You need to connect a water softener before drinking.

Water softener: sodium ions are used to replace calcium and magnesium ions in the water to soften the water quality, prevent scaling, and protect the subsequent water purification equipment and water-related electrical appliances, which is suitable for areas with hard water.

Water purifier: also known as drinking water machine, high-precision filtration system, effective filtration of tap water, can be directly consumed