A device for storing and dispensing a liquid, the device comprising: a tank for containing a liquid having an inlet (2; 8) and an outlet, configured to be pre-charged with a gas, preferably air, at a first pressure that is higher than atmospheric pressure and at least partially filled with the liquid until reaching a second pressure that is higher than said first pressure; and a fluid regulator connected to the outlet of the tank in order to regulate the passage of the liquid, the fluid regulator comprising an outflow conduit having an intake section and an outlet section, and a floating shutter; the fluid regulator being switchable between a closed configuration, wherein the shutter occludes the intake section of the outflow conduit when the level of liquid is in the intake section of the outflow conduit so as to prevent the passage of gas in the outflow direction of the liquid, and an open configuration, wherein the shutter is separated from the intake section of the outflow conduit so as to allow the transit of the liquid; the open configuration being determined by the hydrostatic thrust of the liquid on the shutter; characterized by further comprising: an air enricher connected to the fluid regulator so as to enable the intake of air into the tank, and a recharging circuit connected to an outlet of the air enricher, the recharging circuit comprising a chamber, being dimensioned in proportion to the tank, and a conduit connected to a portion of the tank above the level of the liquid in the tank, wherein the tank, the air enricher, the chamber and the conduit are in fluid communication. a tank for containing a liquid having an inlet (2; 8) and an outlet, configured to be pre-charged with a gas, preferably air, at a first pressure that is higher than atmospheric pressure and at least partially filled with the liquid until reaching a second pressure that is higher than said first pressure; and a fluid regulator connected to the outlet of the tank in order to regulate the passage of the liquid, the fluid regulator comprising an outflow conduit having an intake section and an outlet section, and a floating shutter; the fluid regulator being switchable between a closed configuration, wherein the shutter occludes the intake section of the outflow conduit when the level of liquid is in the intake section of the outflow conduit so as to prevent the passage of gas in the outflow direction of the liquid, and an open configuration, wherein the shutter is separated from the intake section of the outflow conduit so as to allow the transit of the liquid; the open configuration being determined by the hydrostatic thrust of the liquid on the shutter; characterized by further comprising: an air enricher connected to the fluid regulator so as to enable the intake of air into the tank, and a recharging circuit connected to an outlet of the air enricher, the recharging circuit comprising a chamber, being dimensioned in proportion to the tank, and a conduit connected to a portion of the tank above the level of the liquid in the tank, wherein the tank, the air enricher, the chamber and the conduit are in fluid communication. an air enricher connected to the fluid regulator so as to enable the intake of air into the tank, and a recharging circuit connected to an outlet of the air enricher, the recharging circuit comprising a chamber, being dimensioned in proportion to the tank, and a conduit connected to a portion of the tank above the level of the liquid in the tank, wherein the tank, the air enricher, the chamber and the conduit are in fluid communication.