Discharge connection for the separated discharge of fluids of different densities

A discharge connection having a cup-shaped housing which comprises a housing base and a housing wall, wherein a connecting geometry is configured externally on the housing wall for inserting into a container opening, wherein an inlet pipe is guided from an inlet side to an outlet side through the housing base, and a collecting chamber is configured between the inlet pipe and the housing wall, wherein the housing has a drain channel which leads from the collecting chamber to the outlet side and is closable from the outlet side, wherein the inlet pipe on the outlet side transitions into an outlet pipe which on an outer end has an outwardly closing check valve with a valve body and a valve seat arranged on the outlet side, in that the outlet pipe has a first coupling geometry at the outer end thereof, which can be interlockingly connected to a conduit coupling, and wherein the check valve is designed to be moved from the valve seat into an open position, spaced apart from same, by a profile element projecting into the outer end.