You can't drink it. The water treated by the water purifier is only filtered, which does not mean sterilization. The bacteria in it can only be killed at high temperature, so the water treated by the water purifier contains a lot of bacteria that have not been killed and cannot be drunk.

Extended data:

Effects of water on human body;

Water is an indispensable medium for biochemical changes in all physiological processes of human body. Water has strong solubility and ionization ability (water molecules have strong polarity), which can make water-soluble substances exist in dissolved state and electrolyte ion state. Even some fats and protein can be dissolved in water under proper conditions to form emulsion or colloidal solution. Substances dissolved or dispersed in water are beneficial to effective chemical reactions in the body.

After food enters the cavity and gastrointestinal tract, it can only be digested and absorbed by digestive juice secreted by digestive organs, such as saliva, gastric juice, pancreatic juice, intestinal juice and bile. The content of water in these digestive juices is as high as over 90%.

In the process of metabolism, substance exchange and chemical reaction in human body are all carried out in water. Water is not only the medium of biochemical reactions in vivo, but also participates in chemical reactions such as oxidation, reduction, synthesis and decomposition in vivo. Water is the guarantee of normal metabolism of various chemicals in the body.

References:

Baidu encyclopedia-water