Acoplamiento sanitario

A sanitary coupling (1) is provided that connects an inflow-side and an outflow-side line section to each other. A sanitary insert element (5) is provided that has an insert housing (4) and is insertable via an end-side insert opening into a housing receptacle (7) of a first line section (2). The housing interior (6) of the insert housing (4) communicates with the ambient air, in that an annular zone (10) is provided between the housing outer circumference of the insert housing (4) and the inner circumference of the housing receptacle (7), and in a partial region of said annular zone (10), at least one air duct (12) which is effective between housing interior (6) and housing outer circumference is provided. The first line section (2) has at least one air slot (13) which is open toward the end circumferential edge (9) and towards the inner circumference and towards the outer circumference of the first line section (2), and in the partial region of the annular zone (10) that is arranged between the annular flange (8) and the at least one annular seal (11), an air gap (14) is arranged between the housing outer circumference and the inner circumference of the housing receptacle (7), which air gap connects the air duct (12) to the air slot (13).