What are the reasons for the turbidity of the water purifier?

The water purifier is a device for filtering impurities in water. When the water it filters out is turbid, we need to know that it has a problem and needs to be solved. So, what are the reasons for the turbidity of the water?
a. It is necessary to consider whether the inlet pressure is too high or the fluctuation is too large, causing the ultrafiltration membrane to rupture. We can check that if it does break, it must be replaced with a new ultrafiltration membrane.
b. Check if the O-ring above the filter element is leaking due to wear and tear. If this is the case, we need to replace the new fore seal.
c. None of the above problems have occurred. That is, the water purifier has been used for a long time, or has not been cleaned for a long time, so that the bacteria in the machine will breed and cause secondary pollution to the water quality.
When we use the water purifier, we have to master the common sense, such as the filter cartridge of the water purifier and the service life of the ultrafiltration membrane, so that they can be easily replaced.
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