Can the water in the water purifier be drunk directly

As everyone pays more attention to drinking water issues, more and more residents choose water purifiers to ensure water safety and improve the quality of life. But there are many types of household water purifiers, such as: pre-filter, ultrafiltration machine and RO reverse osmosis machine.
Different water purification products have different purification effects. In other words, not all water purified by the water purifier can be directly drunk. This is also a cause of doubt for many consumers. Some water purifiers can be drunk directly after purification, while others need to be heated. So, can the water in the water purifier be drunk directly? The World Health Organization announced: TDS value less than 50 can be used for direct drinking.

1. Ultrafiltration machine: direct drinking is not allowed
working principle
For pressurized membrane separation technology, the average pore diameter of the membrane is 10-100 microns, which is used to separate macromolecular solutes.
Features
1) It can filter out harmful substances such as bacteria, rust, colloid and residual chlorine in the water.
2) Retain the trace elements and minerals that are beneficial to the human body in the water.
3) No power consumption, no waste water, energy saving and environmental protection.
TDS value
After being purified by the ultrafiltration machine, its TDS value is almost the original water or slightly lower than the original water, unable to filter out the scale (calcium, magnesium ions), it is not recommended to drink directly.
2. Reverse osmosis water purifier (pure water machine, RO machine): can drink directly
working principle
Using reverse osmosis filtration method to pressurize the raw water to obtain nearly 100% pure water.
Features
1) Super filtration can filter out harmful substances such as bacteria, germs, heavy metals, organics and so on in the water.
2) The purified water obtained can be drunk directly.
3) It needs to be energized and has a certain amount of "concentrated water"
TDS value
After filtering by RO machine, its TDS value is less than 50, and it can be consumed directly.

3. Pre-filter: can not drink directly
working principle
The first coarse filtration equipment for the whole house water can remove the precipitated impurities and bacteria, microbial remains, rust, sand and mud produced by the pipeline and particles larger than 5 microns.
Features
1) Coarse filtration protects downstream pipelines and related household appliances.
2) Avoid harm to human body and skin.
3) The price is economical.
TDS value
The TDS value of the water purified by the pre-filter is basically the same as that of the raw water, but it is only coarsely filtered, so it cannot be drunk directly.