Abstract: Device designed to supply water to aircraft galleys. The device operates simply, autonomously and independently and is provided with a simple structure. The device comprises a system which supplies a quantity of pressurized water from bladder tank of a container, consisting of a receptacle and a cover, and which recovers an equivalent or greater quantity of contaminated water in bladder tank of the same container. In this way, there is no longer an outflow of water. The device requires no electrical or pneumatic pump. The pressure in the water circuit is generated by the spring which is compressed in the container when bladder tank is being filled with drinking water and which acts on the piston, which in turn compresses the bladder tank. The water circuits are reduced to a minimum. The device is installed in a pressurized area and eliminates all frost-related risks.