Vacuum-assisted motor pumps built on a frame with wheels and built-in tank, parking jacks, electric start with battery and motor protection control unit. Ideal for aspiration from wellpoint systems. The priming of the pump is automatic thanks to the presence of a volumetric depressor. The system guarantees continuity of operation even in the presence of considerable quantities of air without the pump switching off. The pumping of more abrasive fluids with a high passage of solid parts is guaranteed by the robustness of the hydraulic system and the exclusive impeller, of the type with open blades and double curvature.