A fitting for a fluid conduit, comprising: a coupling body having an inside surface for engaging an outside surface of a fluid conduit and having a shoulder portion for limiting axial insertion of the fluid conduit into the coupling body; at least one seal (30, 32, 34) formed on said inside surface of said coupling body, said at least one seal including a proximal seal that is proximal to the shoulder; at least one seal land (46, 70) formed on an outside surface of said coupling body opposite said at least one seal (30, 32, 34); and a ring (14, 16) to be annularly disposed on said coupling body, wherein said ring is engageable with said at least one seal land (46, 70) thereby to urge said at least one seal into engagement with an outer surface of said fluid conduit to seal and < mechanically connect said coupling body to the fluid conduit, wherein a crevice volume is defined radially between the inside surface and said outside surface of the fluid conduit when the fitting is connected to the fluid conduit, the crevice volume being defined axially between said shoulder portion and said proximal seal characterised in that the proximal seal is situated immediately adjacent the shoulder portion and a small radius blends said proximal seal into said shoulder portion, said small radius sealing with said fluid conduit to seal off said crevice volume when said ring (14, 16) urges said at least one seal including said proximal seal into said fluid conduit, and said crevice volume is reduced or eliminated when said ring (14, 16) urges said at least one seal including said proximal seal into said fluid conduit. a coupling body having an inside surface for engaging an outside surface of a fluid conduit and having a shoulder portion for limiting axial insertion of the fluid conduit into the coupling body; at least one seal (30, 32, 34) formed on said inside surface of said coupling body, said at least one seal including a proximal seal that is proximal to the shoulder; at least one seal land (46, 70) formed on an outside surface of said coupling body opposite said at least one seal (30, 32, 34); and a ring (14, 16) to be annularly disposed on said coupling body, wherein said ring is engageable with said at least one seal land (46, 70) thereby to urge said at least one seal into engagement with an outer surface of said fluid conduit to seal and < mechanically connect said coupling body to the fluid conduit, wherein a crevice volume is defined radially between the inside surface and said outside surface of the fluid conduit when the fitting is connected to the fluid conduit, the crevice volume being defined axially between said shoulder portion and said proximal seal characterised in that the proximal seal is situated immediately adjacent the shoulder portion and a small radius blends said proximal seal into said shoulder portion, said small radius sealing with said fluid conduit to seal off said crevice volume when said ring (14, 16) urges said at least one seal including said proximal seal into said fluid conduit, and said crevice volume is reduced or eliminated when said ring (14, 16) urges said at least one seal including said proximal seal into said fluid conduit.