A connector (100) for a medical device including a body (110) having a proximal end (114), a distal end (112), and a passage (116) extending therethrough between the proximal end and the distal end that fluidly connects the proximal end and the distal end. The proximal end (114) includes a connecting portion (119) for releasably connecting the connector to an external device. The distal end (112) is fluidly connected to a conduit. A cylinder (124) is rotatably disposed in the passage (116) between first position and a second position, wherein the cylinder includes an opening (128) extending generally diametrically therethrough. One or both ends (130,132;230,232) of the cylinder provide manually- or tool-engageable sections (136;236) to enable rotation of the cylinder between open and closed positions, allowing and preventing fluid flow through the connector (100), respectively.