Connector (1; 17; 18; 22; 26; 28; 31) for fluid-tight connection of at least two fluid-carrying components, comprising - a connector base body; - at least two insertion sections (3 to 5) formed in the connector base body for inserting a respective connection section of the fluid-carrying component, -- wherein at least one of the insertion sections (3 to 5) widens inwardly in the connector base body towards at least one fluid passage (6, 7; 23 to 25; 27) of the connector (1; 17; 18; 22; 26; 28; 31) via a conically widening inner wall (8, 9, 10) of the connector (1; 17; 18; 22; 26; 28; 31), -- wherein the conical widening of the at least one insertion section (3 to 5) extends from an insertion opening of the insertion section towards a constriction of the connector (1; 17; 18; 22; 26; 28; 31), --- wherein the at least one insertion section (3 to 5) transitions into the fluid passage (6, 7; 23 to 25; 27) via the constriction, --- wherein the internal diameter of the fluid passage is configured such that in use, the external diameter of the fluid-carrying component inserted into the insertion section (3 to 5) is slightly greater than the internal diameter of the fluid passage so the constriction acts as a stop for the fluid-carrying component inserted into the insertion section (3 to 5). - a connector base body; - at least two insertion sections (3 to 5) formed in the connector base body for inserting a respective connection section of the fluid-carrying component, -- wherein at least one of the insertion sections (3 to 5) widens inwardly in the connector base body towards at least one fluid passage (6, 7; 23 to 25; 27) of the connector (1; 17; 18; 22; 26; 28; 31) via a conically widening inner wall (8, 9, 10) of the connector (1; 17; 18; 22; 26; 28; 31), -- wherein the conical widening of the at least one insertion section (3 to 5) extends from an insertion opening of the insertion section towards a constriction of the connector (1; 17; 18; 22; 26; 28; 31), --- wherein the at least one insertion section (3 to 5) transitions into the fluid passage (6, 7; 23 to 25; 27) via the constriction, --- wherein the internal diameter of the fluid passage is configured such that in use, the external diameter of the fluid-carrying component inserted into the insertion section (3 to 5) is slightly greater than the internal diameter of the fluid passage so the constriction acts as a stop for the fluid-carrying component inserted into the insertion section (3 to 5). -- wherein at least one of the insertion sections (3 to 5) widens inwardly in the connector base body towards at least one fluid passage (6, 7; 23 to 25; 27) of the connector (1; 17; 18; 22; 26; 28; 31) via a conically widening inner wall (8, 9, 10) of the connector (1; 17; 18; 22; 26; 28; 31), -- wherein the conical widening of the at least one insertion section (3 to 5) extends from an insertion opening of the insertion section towards a constriction of the connector (1; 17; 18; 22; 26; 28; 31), --- wherein the at least one insertion section (3 to 5) transitions into the fluid passage (6, 7; 23 to 25; 27) via the constriction, --- wherein the internal diameter of the fluid passage is configured such that in use, the external diameter of the fluid-carrying component inserted into the insertion section (3 to 5) is slightly greater than the internal diameter of the fluid passage so the constriction acts as a stop for the fluid-carrying component inserted into the insertion section (3 to 5). --- wherein the at least one insertion section (3 to 5) transitions into the fluid passage (6, 7; 23 to 25; 27) via the constriction, --- wherein the internal diameter of the fluid passage is configured such that in use, the external diameter of the fluid-carrying component inserted into the insertion section (3 to 5) is slightly greater than the internal diameter of the fluid passage so the constriction acts as a stop for the fluid-carrying component inserted into the insertion section (3 to 5).