The faucet comprises a body having a cold water inlet, a hot water inlet and a service water outlet, and housing a monocontrol mechanism, for blocking and liberating the communication between the cold water inlet and/or hot water inlet with the service water outlet; a tubular column, coupled to the body and open to the service water outlet, and onto which is mounted a first head carrying a service radial spout connected to the service water outlet; a filter cartridge mounted in the interior of the tubular column, inferiorly connected to the cold water inlet and onto which is mounted a second head which carries a filtrate radial spout connected to the outlet nozzle of the filter cartridge; and a filtrate cock for blocking and liberating the fluid communication between the cold water inlet and the filtrate radial spout.