The total hardness test, measured in units of dH (degrees of German hardness), is important for determining the effectiveness of filters that remove hardness-causing minerals in water, such as calcium and magnesium.
Total hardness testing is carried out before installing Brita filters such as PURITY Clean Extra and Purity Finest, as it allows a comparison of the hard mineral content of the water before and after filtration. This is how the efficiency and lifetime of Brita filters can be assessed.
The filter capacity tables allow us to predict how much water can be filtered by a single filter before a cartridge replacement is needed. Each cartridge has a limited filtering capacity and must be replaced after a certain time or volume of filtered water. The filter capacity tables are used to plan cartridge changes and ensure that the quality of the filtered water remains constant.
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