In line fluid sampling port

A fluid sampling port for a housing through which fluid flows, the housing having an inlet and outlet defined in opposite sides to establish an elongated flow path through the housing with the housing defining an opening communicating with the flow path through the housing, the sampling port comprising;

• a cylindrical resilient valve body having a normally closed, through, axial slit defining at least two slit segments, the cylindrical resilient valve body including an upper portion with a top surface, a lower portion with a bottom flange that is sized to rest on said housing surrounding and closing the opening in said housing, and a shoulder defined between the upper portion and the lower portion;
• and a planar disc securing member defining a central opening, the planar disc securing member including a planar disc portion, and an upstanding rim above the planar disc portion and surrounding the central opening, the planar disc securing member being mounted in registry with the opening in the housing, wherein said resilient valve body is inserted into the central opening of the planar disc securing member with the upper portion of the resilient valve body above the planar securing member, with the upstanding rim of the planar disc securing member bearing against the shoulder between the upper portion and the lower portion of the resilient valve body, and with the bottom flange and lower portion of the resilient valve body below the planar disc portion of the planar disc securing member, said planar disc securing member clamps the bottom flange of the resilient valve body to the housing and seals the opening in the housing, with the upper portion of the resilient valve body protruding upwardly through the central opening in the planar disc securing member, and the normally closed slit of the resilient valve body is capable of receiving a needleless connector so as to stress the slit segments of the resilient valve body and force these slit segments into the housing to establish a gap for withdrawal of a fluid sample.