A needleless connector comprising: a body comprising a fluid path, a vent path, and a male fitting with a distal port; a valve including a finger, the valve disposed within the male fitting and configured to move between a first configuration, in which the fluid path is blocked, and a second configuration, in which the fluid path is open, wherein displacement of the finger in a direction causes the entire valve to move in the same direction; and a sealing tip fixedly disposed around the valve, the sealing tip including a seal that forms a sliding seal between the valve and the male fitting, the seal configured to slide along an inner surface of the male fitting and to separate the fluid path from the vent path in the first configuration and in the second configuration, wherein the seal maintains separation between the fluid path and the vent path as the seal slides along the inner surface of the male fitting when the valve moves from the first configuration to the second configuration, and wherein the sealing tip sealingly contacts the distal port in the first configuration to block the fluid path; characterized by a sliding seal disposed over a portion of the male fitting and configured to be in sealing contact with the male fitting in the first configuration, and not be in sealing contact with the male fitting in the second configuration, wherein moving the sliding seal to the second configuration opens the seal between the sliding seal and the male fitting, thus to open the vent path, and displaces the valve to the second configuration, thereby opening the seal between the valve and the port, thus to open the fluid path, wherein the finger is disposed within a portion of the sliding seal and external to a portion of the male fitting. a body comprising a fluid path, a vent path, and a male fitting with a distal port; a valve including a finger, the valve disposed within the male fitting and configured to move between a first configuration, in which the fluid path is blocked, and a second configuration, in which the fluid path is open, wherein displacement of the finger in a direction causes the entire valve to move in the same direction; and a sealing tip fixedly disposed around the valve, the sealing tip including a seal that forms a sliding seal between the valve and the male fitting, the seal configured to slide along an inner surface of the male fitting and to separate the fluid path from the vent path in the first configuration and in the second configuration, wherein the seal maintains separation between the fluid path and the vent path as the seal slides along the inner surface of the male fitting when the valve moves from the first configuration to the second configuration, and wherein the sealing tip sealingly contacts the distal port in the first configuration to block the fluid path; characterized by a sliding seal disposed over a portion of the male fitting and configured to be in sealing contact with the male fitting in the first configuration, and not be in sealing contact with the male fitting in the second configuration, wherein moving the sliding seal to the second configuration opens the seal between the sliding seal and the male fitting, thus to open the vent path, and displaces the valve to the second configuration, thereby opening the seal between the valve and the port, thus to open the fluid path, wherein the finger is disposed within a portion of the sliding seal and external to a portion of the male fitting.