- In cooperation with Damen Hydrauvision Rental offers a complete range of heavy-duty and cost-effective submersible dredge pumps. These compact DOP pumps are directly powered by a hydraulic motor, mounted in a protective casing. The robust casing can be fitted out with a large array of suction heads, which results in a versatile dredging tool fit for a broad range of tasks. These DOP pumps are designed to be user friendly and for ease of maintenance.