The installation and maintenance of any water purification device are regulated by precise regulations (Decree of 7 February 2012, no. 25 of the Ministry of Health and Decree of 26 January 2008, no. 37 of the Ministry of Economic Development). The only responsible party is always the company carrying out the installation. Maintenance depends on the flow rate of water delivered over time by the device but is carried out once a year from the year following the first installation. Ordinary annual maintenance consists of replacing the filters, sanitising the entire device and checking the fixed residue and electrical conductivity values.