Seal

An annular seal comprising:

• a main seal body having an upper face, a lower face opposite the upper face, an outer wall and an inner wall opposite the outer wall, wherein a groove extends into the inner wall of the main seal body;
• means for sealing protruding upwardly from the portion of the upper face of the main seal body closest to the inner wall to a position higher than the upper face;
• and
• means for sealing protruding downwardly from the portion of the lower face of the main seal body closest to the inner wall in a direction perpendicular to the lower face to a position below the lower face.

A method of forming a seal between a fitting and port comprising:

• providing an annular seal, the annular seal comprising:
• a main seal body having an upper face, a lower face opposite the upper face, an outer wall and an inner wall opposite the outer wall, wherein a groove extends into the inner wall of the main seal body;
• an upper protruding portion protruding upwardly from the portion of the upper face of the main seal body closest to the inner wall to a position higher than the upper face;
• and
• a lower protruding portion protruding downwardly from the portion of the lower face of the main seal body closest to the inner wall in a direction perpendicular to the lower face to a position below the lower face;
• engaging the seal with a fitting;
• engaging the fitting with a port and;
• inserting the fitting into the port until the seal is compressed between the port and the fitting such that the upper protruding portion and lower protruding portion compress and deform against the fitting and port, respectively, to form a seal.