Product: Ruwal Post replacement cartridge filters RO/DI-1 (anti-nitrate) for all Reverse Osmosis System
This filter removes 90-95% of the nitrate residue upon leaving the reverse osmosis.
Cartridge life varies depending on the amount of nitrate residues from the installation of reverse osmosis. A check of the effectiveness of the cartridge should be done after about 1500-2000 liters of ultra pure water produced: in the case is observed nitrate removal from post-filter, the cartridge must be replaced. If you use both post-filters, RO / DI, should be first, that for the elimination of silicates and in turn that for the elimination of Silicates.