The water purifier effectively remove water sediment, rust, some bacteria in the microbial etc. The filtered water can be drinked directly. Ceramic filter core has been used for a long time, and the surface will accumulate sediment, iron filings, bacteria and other impurities. It is recommended that sand paper be used for cleaning once in 15 days or so.Filter replacement cycle needs to be based on the user's local water quality&water consumption. If the user change the filter cartridge in time, you can ensure a permanent pure water quality. This item is in the category "Home & Garden\Kitchen, Dining & Bar\Small Kitchen Appliances\Water Purification\Water Filters". The seller is "che6-2815" and is located in this country: CN. This item can be shipped worldwide.