Abstract: An apparatus for the carbonation of liquids, such as water, comprises a liquid storage tank coupled to a carbonizer having a carbonated liquid holding tank which presents a carbon dioxide atmosphere to liquid introduced therein. The liquid introduced into the holding tank blends with the carbon dioxide atmosphere, and is held in the tank for withdrawal upon demand. The liquid storage tank maintains a liquid therein at ambient pressure, and has a draw tube for liquid removal positioned proximate the bottom wall of the tank. The tank has a channel system in the tank bottom to allow liquid to collect therein to maximize the amount of liquid which may be withdrawn. Liquid level switches sense the level of liquid within the channel system and are coupled to the carbonizer to prevent its operation when insufficient liquid is present in the storage tank.