Most household water purifiers or water purifiers use PP cotton filters as the first stage filter element. The quality of the PP cotton filter element is particularly important for water purifiers, as it not only directly affects the water quality but also affects the filtration effect and lifespan of the third or fourth stage filters. Before distinguishing the quality, let's first understand the PP cotton filter cartridge:

Introduction to PP Cotton Filter: PP cotton filter is a fiber filter made of polypropylene (a plastic material, also known as PP material). The pore size of the PP cotton filter is uniform and dense, with a maximum filtration accuracy of 1 μ m. It is mainly used to filter out impurities larger than 1 μ m in tap water. In addition, the filtration process of the PP cotton filter is from the outside to the inner layer, and the closer it is to the inner layer of the filter, the smaller the pore size. The higher the accuracy of filtering. As PP cotton filter element belongs to the first stage filter element of water purifier, more than 80% of impurities will be filtered out in this stage, and the more impurities filtered, the easier it is for the filter element to block. So the lifespan of PP cotton filter is very short. Areas with poor water quality may need to replace the filter in just over two months, while areas with better water quality will not exceed six months at most. So if the household water purifier you purchased has a PP cotton filter element, to avoid secondary pollution of the water purifier and affect the filtering effect of the filter element, it is recommended that you replace the filter element every 3-6 months or so.

The quality of PP cotton filter cartridges is determined by the tightness of their fibers. High quality PP cotton filter cartridges have dense and uniform fibers inside, and this difference cannot be seen with the naked eye when purchasing. How should we distinguish? Firstly, check the weight. We can weigh it by hand. The heavier the weight, the higher the fiber density of the filter element. The better the quality. Secondly, look at compressibility. Usually, the higher the fiber density of the filter element. The better the compression performance, the better the quality of the PP cotton filter. We can judge by hand feel, the stronger the hand feel, the better the compression performance.