The first filtration stage takes place when the water passes through the proven BOROUX Foundation™ Black filters through activated carbon. The BOROUX Proactive™ Fluoride filter is screwed onto the shaft of the BOROUX Foundation™ Black filter and secured in place. The second stage of filtration takes place as the water flows through the dual-action BOROUX Proactive™ Fluoride filter.
After the water has passed through the filters in the upper chamber, it first comes into contact with the inner layer of the highly efficient granulated carbon filters in the lower chamber. The water then filters through the patented nano-carbon outer layer. Thanks to the patented Upflow design of the stainless steel housing, the water remains in contact with the outer layer for an extended period, ensuring superior filtration. The filtered water leaves the housing via the outlet holes at the top. This ensures that virtually the entire surface of the fluoride filters is utilised evenly, from bottom to top.