We recommend that you check the hardness of the water, as well as the condition of the hydraulic systems: if the percentage of limestone presence were to be particularly high, we recommend the installation of a sand filter and/or poly-phosphate filter (water softening system). In the same manner, in case of iron pipes or extremely dated ones and in bad conditions, we recommend, where possible, the replacement of the very system: the pipes, in fact, could release iron slag, which would corrode and jeopardize operation of the internal components of the articles. In such cases, as illustrated in the specific section, the warranty expires. In case of water with a high lime scale content, we advice installing inspectable filter taps (codes 1105032 and 1105052) on both delivery lines of deck-mounted bathroom washbasins and bidets, and kitchen sinks. This will prolong the life of the cartridges with ceramic discs and bolts as the inspectable filter taps will retain foreign bodies, if any, that might damage the cartridge sealing.