According to the raw materials used, the life of the filter element will be different. With the extension of service time, impurities in the water will block the filter element, and the activated carbon filter element will absorb and saturate. Therefore, generally speaking, PP filter element needs to be replaced in 3 months, and activated carbon filter element needs to be replaced in 6 months. Because the hollow fiber cannot be cleaned, it is generally placed in the back end of PP cotton and activated carbon, otherwise it is easy to be blocked, and it needs to be replaced for 1-2 years as the end of the water purification equipment for sterilization. Ceramic filter element can be used for 10-12 months in general, a good ceramic filter element can be used for 3-5 years, or even longer.
　　Change signal:
　　1. Too slow to make water: whether the filter element or reverse osmosis membrane of the prefilter is blocked;
　　2. Too fast water making (filling a bucket in less than an hour) : the reverse osmosis membrane is damaged;
　　3. Poor taste: the life of the post-activated carbon filter is over; RO membrane removal rate less than 75% : the life of reverse osmosis membrane has reached.
　　The calculation formula of membrane removal rate is: RO membrane removal rate =(raw water TDS value - pure water TDS value)*100%/ raw water TDS value
　　This paper is sorted out by dongguan oneness filtration technology co., LTD