What are the reasons for the pollution of pure water equipment?

Most of the household water purifier or water purifier are used in the first level of the filter are PP filter, the first level of the filter will not only directly affect the water quality, will also affect the back of the three or four filtration effect and the life of the filter, so the quality of the PP filter for the water purifier is particularly important.

PP cartridge can remove a small amount of solid particles in the liquid or air can protect the normal operation of the equipment or clean air, when the fluid enters the cartridge with a certain specification of the filter, the impurities are blocked, and the clean flow through the cartridge outflow, the cartridge is mainly used for filtration.

Is a water purifier actually useful? Is it useful? Is it useful? Let me tell you, useful to burst!
Professionals also say that in our current drinking water environment, water purifier is a little hero:

Reverse osmosis system design will have a certain degree of surplus, to ensure that in the emergency time is not because of the reverse osmosis system of water production or desalination rate drop, reverse osmosis system differential pressure rise and make the water supply is not enough to cause a threat to the safety of the production, but in fact it is also because of the existence of these surplus makes the hidden faults are sometimes not able to show in time, so that ultimately may be evolved into reverse osmosis membrane Heavy contamination of reverse osmosis membrane elements.