Single piece dual jet pump comprising at least one pressurized fluid inlet orifice and 2 separate outlet orifices which are built has two separate jet pumps. Fuel system for an internal combustion engine including a fuel tank, a reservoir within said tank, a pump for supplying the engine with fuel drawn from the reservoir and such a single piece dual jet pump designed to allow the filling of the reservoir with fuel from at least two different locations in said tank outside the reservoir.