Provided is a water carbonation unit including: at least one water feed and at least one pressurised carbon-dioxide feed； a merging duct extending between a first, closed end and a second end, the at least one water feed and at least one carbon-dioxide feed opening into said duct at said first end； said second end opening into a mixing chamber linked to a carbonated water outlet； the carbonated water outlet configured to restrict outflow of carbonated water from the chamber to thereby maintain pressure within the chamber while carbonated water flows out of the carbonated water outlet.
