Presented herein are embodiments of septum holders for use in syringe connectors that are used to connect syringes to other elements of liquid transfer apparatuses. The septum holders comprise a septum holder body, at least one resilient elongated arm that terminates with a distal enlarged element attached to the sides of the body, and a septum. The septum holders of the invention are characterized in that they comprise at least one bore that is created in the septum or in an insert fixed in either the body of the septum holder or in the septum that functions as the seat of a needle valve and in that the septum is attached to the bottom of the body of the septum holder projecting downwards parallel to the at least one elongated arm.