Cartridge

application of Polyphosphate Filters for the installation and operation of wall heating packages and water heaters has become a common practice due to the hardness of water in urban piping system. These filters help a lot to prevent the damage caused by lime deposits in the heat exchangers of heating systems. The presence of such filters increases the thermal efficiency of the device, reduces energy consumption and postpones periodic service costs. However contents inside the filter, especially polyphosphate stones may be ignored.

Polyphosphate stones with the scientific name of sodium hexametazone are very soluble stones that when water passes through these stones, a very small amount (about a few ppm) dissolves in water and prevents calcareous deposits.

In many cases, the esteemed consumer is informed about the annual replacement of the internal stones of these filters.

Based on the consumption and water hardness of a residential unit, the stone inside the cartridge can be used for about one yearand the cartridge must be charged for the next year. though, this can be done by the consumer at a small cost.
Filberto cartridges have a one-year warranty from the time of installation.