I would recommend installing an additional filter cartridge in front of this filter with a filtration of no more than five microns in a transparent case, which will increase the life of the filter cartridges by three to four months, in addition, you will see the degree of contamination. It is better to change this cartridge at least once every six months. Once it turned black for me a week after the replacement - somewhere they carried out work in the water supply system. In other photos, the retaining rings and the assembled system: a blue tube from a horizontal cartridge after the mineralizer, white clean water for the kettle.
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