A device for pumping products from a pumping area to a storage enclosure, said pumping device comprising: - two transit tanks (4A, 4B) configured to receive the products to be pumped, separating into non-gaseous products and gaseous products, each of said transit tanks (4A, 4B) being provided with a product inlet (5A, 5B), a non-gaseous product drain outlet (7A, 7B) and a suction orifice (6A, 6B); - a transfer system configured to generate a suction of the products from the pumping area to said transit tanks (4A, 4B) and to generate a transfer of the non-gaseous products from said transit tanks (4A, 4B) to the storage enclosure; - a plurality of valves (3A, 3B, 3D, 3E, 31, 4C, 4D, 4I, 4J) adapted to be controlled and configured to alternately either allow or block a communication of one of said transit tanks (4A, 4B) with the transfer system and the pumping area and a communication of the other of said transit tanks (4A, 4B) with the transfer system to the storage enclosure; and - a control system of said plurality of valves (3A, 3B, 3D, 3E, 3I, 4C, 4D, 4I, 4J), said transfer system comprising: - a suction unit provided with at least two hydro-ejectors (13A, 13B) connected to the suction orifice (5A, 5B) of each of said transit tanks (4A, 4B) and configured to at least generate the suction and the separation of the products to be pumped into gaseous and non-gaseous products; and - a transfer unit distinct from the suction unit, which is provided with a volumetric transfer pump configured to at least generate the transfer of the non-gaseous products to the storage enclosure, characterized in that: - the suction of the products from the pumping area is generated by a vacuuming of the transit tanks (4A, 4B) by limiting the vacuum exposure time; - the volumetric transfer pump is connected to the drain outlet (7A, 7B) of each of said transit tanks (4A, 4B). - two transit tanks (4A, 4B) configured to receive the products to be pumped, separating into non-gaseous products and gaseous products, each of said transit tanks (4A, 4B) being provided with a product inlet (5A, 5B), a non-gaseous product drain outlet (7A, 7B) and a suction orifice (6A, 6B); - a transfer system configured to generate a suction of the products from the pumping area to said transit tanks (4A, 4B) and to generate a transfer of the non-gaseous products from said transit tanks (4A, 4B) to the storage enclosure; - a plurality of valves (3A, 3B, 3D, 3E, 31, 4C, 4D, 4I, 4J) adapted to be controlled and configured to alternately either allow or block a communication of one of said transit tanks (4A, 4B) with the transfer system and the pumping area and a communication of the other of said transit tanks (4A, 4B) with the transfer system to the storage enclosure; and - a control system of said plurality of valves (3A, 3B, 3D, 3E, 3I, 4C, 4D, 4I, 4J), said transfer system comprising: - a suction unit provided with at least two hydro-ejectors (13A, 13B) connected to the suction orifice (5A, 5B) of each of said transit tanks (4A, 4B) and configured to at least generate the suction and the separation of the products to be pumped into gaseous and non-gaseous products; and - a transfer unit distinct from the suction unit, which is provided with a volumetric transfer pump configured to at least generate the transfer of the non-gaseous products to the storage enclosure, - a suction unit provided with at least two hydro-ejectors (13A, 13B) connected to the suction orifice (5A, 5B) of each of said transit tanks (4A, 4B) and configured to at least generate the suction and the separation of the products to be pumped into gaseous and non-gaseous products; and - a transfer unit distinct from the suction unit, which is provided with a volumetric transfer pump configured to at least generate the transfer of the non-gaseous products to the storage enclosure, characterized in that: - the suction of the products from the pumping area is generated by a vacuuming of the transit tanks (4A, 4B) by limiting the vacuum exposure time; - the volumetric transfer pump is connected to the drain outlet (7A, 7B) of each of said transit tanks (4A, 4B). - the suction of the products from the pumping area is generated by a vacuuming of the transit tanks (4A, 4B) by limiting the vacuum exposure time; - the volumetric transfer pump is connected to the drain outlet (7A, 7B) of each of said transit tanks (4A, 4B).