TANK WITH VENTILATION CHANNEL WITH COVER

The invention relates to a reservoir (1) for the storage of a liquid, comprising a wall (10) made of plastic material and a device for stopping the filling of this reservoir (1) with a liquid at a maximum filling level, the device extending inside the reservoir (1), and comprising at least one opening (71) whose position inside the reservoir (1) sets this maximum filling level. The device for stopping the filling of this reservoir (1) comprises a first part (20) formed with the wall (10) and a second part (50) which is fixed in a sealed manner to the first part.