Device for containing liquid, of the type container or circulation circuit, and methods of manufacturing this device. The invention relates to a device (1) for containing liquid, of the type container or thermal regulation circuit with
heat transfer fluid, comprising at least one
metal wall (2) which has openings (3, 3') for the passage of the liquid through said wall (2), a supply or
discharge pipette (4, 4') being present on the external face of said wall (2), at the level of each opening (3, 3') and being connected in a hermetic manner to the opening (3, 3') concerned.Device (1) characterized in that each
pipette (4, 4') is a
pipette made of
thermoplastic material, attached exclusively indirectly to the
metal wall (2), around the relevant opening (3, 3'), through an intermediate
metal piece (5), assembled directly with the outer face of said metal wall (2), and / or, through an intermediate piece or layer made of
thermoplastic material (5'), attached by
welding or overmolding onto the outer face (2') of said metal wall (2) or onto an intermediate metal piece (5) assembled directly with said outer face (2') of the metal wall (2). Figure to be published with the abbreviation: Fig. 5A.