A dispensing device, comprising: a dispensing nozzle comprising a leading end; a water feed pump; a water feed valve (17; 50); a tubing; a dispensing pump connected to the tubing, wherein the tubing is disposed between a dispensing nozzle and a water feed pump; wherein the water feed pump is configured to supply deaerated water supplied into the tubing to fill up to the leading end of the dispensing nozzle; wherein the water feed valve (17; 50) is configured to be closed to form a deaerated water space in the tubing, wherein the deaerated water space is between the dispensing nozzle, and the water feed valve (17; 50); wherein the dispensing pump is separate from the water feed pump and is configured to be operated to perform a suction and an exhaust action using the dispensing nozzle, and characterized in that it further comprises a change-over valve (17; 51); a vacuum means (24; 53); in that the vacuum means (24; 53) is separate from the water feed pump and the dispensing pump; in that the vacuum means (24; 53) is configured to maintain a negative pressure state in the tubing via the change-over valve (17; 51); and in that the vacuum means (24; 53) is connected to the deaerated water space via the change-over valve (17; 51); and in that the change-over valve (17; 51) is configured to be opened such that the vacuum means (24; 53) negatively pressurizes the deaerated water space such that bubbles in the deaerated water supplied to the deaerated water space are removed; and in that the dispensing device further comprises control circuitry programmed to cause the change-over valve (17; 51) to repeatedly open to remove bubbles in the deaerated water, until the control circuitry determines that no bubbles exist in the deaerated water space. a dispensing nozzle comprising a leading end; a water feed pump; a water feed valve (17; 50); a tubing; a dispensing pump connected to the tubing, wherein the tubing is disposed between a dispensing nozzle and a water feed pump; wherein the water feed pump is configured to supply deaerated water supplied into the tubing to fill up to the leading end of the dispensing nozzle; wherein the water feed valve (17; 50) is configured to be closed to form a deaerated water space in the tubing, wherein the deaerated water space is between the dispensing nozzle, and the water feed valve (17; 50); wherein the dispensing pump is separate from the water feed pump and is configured to be operated to perform a suction and an exhaust action using the dispensing nozzle, and characterized in that it further comprises a change-over valve (17; 51); a vacuum means (24; 53); in that the vacuum means (24; 53) is separate from the water feed pump and the dispensing pump; in that the vacuum means (24; 53) is configured to maintain a negative pressure state in the tubing via the change-over valve (17; 51); and in that the vacuum means (24; 53) is connected to the deaerated water space via the change-over valve (17; 51); and in that the change-over valve (17; 51) is configured to be opened such that the vacuum means (24; 53) negatively pressurizes the deaerated water space such that bubbles in the deaerated water supplied to the deaerated water space are removed; and in that the dispensing device further comprises control circuitry programmed to cause the change-over valve (17; 51) to repeatedly open to remove bubbles in the deaerated water, until the control circuitry determines that no bubbles exist in the deaerated water space.