1. Look at the filter element: first of all, it is enough to filter impurities (high-end reserves minerals; The low-end ones can filter larger microorganisms, but do not retain minerals)
Secondly, it is enough to filter odor (anyone with activated carbon can do it; The difference is powder or honeycomb activated carbon; The price difference between the two is 1 times for the same volume)
Finally, whether it can kill microorganisms (high-end ones will use ultraviolet sterilization; Not available at the low end)
2. Look at the installation: generally, the pipeline will be changed (installed on the water pipe, under the stage or on the stage, and non-professionals can't install it by themselves, so clean water and tap water can be used separately)
Part-there is no need to change the pipeline (using the diverter valve, connecting the faucet and valve for diversion, which is convenient to install, mostly for the table top machine)
3. Look convenient: High-end template indicator light reminds you whether to replace the filter element)
Replacement-is it convenient to replace the filter element (low-end ones are often difficult to replace themselves; High-end users can easily replace the filter element)
4. Look at the consumption: the wastewater generated in the process of water purification (the wastewater generated at the low end is more than 1:3, and the standards are different, which is very wasteful; The middle end produces a waste interest rate of 1:3, which also invisibly increases the use cost; The high-end water purifier does not need to produce waste water, which greatly saves the cost)
Note: The heavy metal elements in the "waste water" discharged by the purifier often exceed the standard, so the clothes will become hard when washed with the discharged water;
mopping the floor will damage the floor and floor tiles;
you can't even flush the toilet, which will corrode the ceramics;
not to mention washing vegetables.
5. Look at the reputation: any water purifier that says that it is unnecessary to replace the filter element is lying to you. If you don't believe me, I will show you his instruction manual, which definitely indicates the replacement time.
6. Look at the technology: the more patented technologies, the more advanced they are (the term of patent protection: 2 years for invention patents and 1 years for utility model patents and designs from the date of application)
7. Look at the sales: a good salesman will give you a detailed introduction of the water purifier sold, and its performance is good and bad, instead of blindly advocating it.