Flow filters, using the reverse osmosis phenomenon, are one of the most frequently used home water treatment systems. They are mounted directly on pipes that deliver water to the house. Their popularity is connected both with the remarkable accuracy of cleaning (up to 0.5 microns) and high efficiency. As a result, contaminants such as chlorine and its residues, heavy metals, pesticides and mechanical impurities such as sediments, fine sand and rust are removed from the water. There are a few important points to keep in mind in order to maintain the quality and purity of filtered water using flow filters
The frequency of exchange depends on several factors. More frequent service is indicated for users using their own water intake. This is due to the fact that the water from the well is not pre-treated in any way, so the cartridges in the reverse osmosis system have more impurities to absorb, which means they lose their attributes faster. Water from the aqueduct, reverse osmosis cartridges can be replaced less often because it is not so heavily polluted.
However, some filters placed on plumbing have additional tasks and require more frequent replacement. According to the warranty conditions, a polypropylene filter that removes sand, fine suspended solids, corrosion products, impurities leached from the surface of hydraulic systems or fats from the water, should be replaced with max. every 3 months. It is recommended to install 2 such filters at the beginning and end of the line. The activated carbon filter, which effectively removes chlorine and other organic pollutants, is also recommended to replace every 3 months. The lifetime of the ion exchange resin filter, which softens the water by removing calcium and magnesium ions, depends on the hardness and quantity of filtered water. Its life time is about 1 month, just like the nitrate filter, recommended for homes with their own water intake and farms, which contains anionic ion exchange resin, absorbs harmful nitrates from field fertilization and leaking cesspools.