Hydraulic connector for windscreen-washer system

The connector has an inlet connection (42) comprising an inlet (420) connected to an inflow. Outlet connections (44-46) supply fluid to a supplying ramp and an arm. A main base (41) bears the outlet connections on which the inlet connection is fixed, where the inlet connection is fixed at the main base by an ultrasound welding or joining. A non-return finger device (43) i.e. non-return valve, comprises a ball or membrane inserted between the main base and the inlet connection. An independent claim is also included for a windscreen wiping system for a motor vehicle comprising a wiping arm.