The accuracy of this filter is between 50 microns and 100 microns, and it is usually installed behind the water meter and in front of other water purification equipment. Main function: filter out 98% impurities in water, such as sediment, rust, insects, etc. , and protect other devices. The water filtered by the prefilter cannot be directly drunk.
Most water purifiers are reverse osmosis machines, also called RO machines. Main function: filter all dissolved salts and organic matter with molecular weight greater than 100 and allow water molecules to pass through. The water purifier has high water purification accuracy, and all visible and invisible substances can be filtered out-only water molecules can pass through the filter element of the water purifier.
Its goal is also relatively simple-it only provides drinking water filtration and has no effect on other water use functions.
As can be seen from the function, the function of the end water purifier is more powerful, even including the function of pre-filtration.
Advantages: it can effectively remove soluble impurities, bacteria, viruses, chemical pollutants, chlorine used for disinfection in waterworks, heavy metal residues in pipelines, small molecular organics, etc.
The purification speed of the terminal water purifier is relatively slow, and the cost of water purification is relatively high (water, electricity and expensive filter elements). Therefore, the water supply points are also very limited, which can not meet the water consumption of the whole house.
If conditions permit, I suggest that both the pre-filter and the water purifier should be installed at the same time. Pre-filter is installed at the entrance of tap water to pretreat the water, and water purifier is installed in the kitchen, which has higher filtration accuracy and can meet the drinking standard. You can choose whole house clean water if you have the conditions.