automatic dispensing adapter 500 connecting socket 507 has a shoulder 508 adapted to receive the lower end of valve 604 such that when automatic dispensing adapter 500 is snugly attached to dispensing outlet 305 valve 604 will be pushed upward to the open position and fluid passageway 702 will open regardless of the position of valve cap 200 this configuration is depicted in fig2 in which the lower end of valve 604 is resting upon shoulder 508 which has caused valve 604 to move upward compressing compression spring 602 fig2 shows tap 300 connected to automatic dispensing adapter 500 to create fluid passageway 702 the upward movement of valve 604 has also raised valve stem 606 and barbs 608 have moved to a position above internal ridge 208 in this configuration the flow of wine or other fluid will be controlled by an external pump or other mechanism attached to the distal end of a tube not shown whose proximal end will be attached to hose barb 502 it will be appreciated that the embodiment of tap 300 depicted in fig9 16 will always be forced open when automatic dispensing adapter 500 is attached regardless of the manually selected position of valve cap.