Dewatering Pumps, Waste-Water Pumps and Sump Pumps. BJM offers the perfect solution to efficient waste-water pumping, construction site dewatering, effluent dewatering and more. BJM Pumps provide top performance and excellent quality for a modest investment. BJM Pumps provides a complete line of standard and specially designed electric submersible pumps - engineered to meet your most stringent requirements. BJM Pumps also has a complete line of pump accessories such as Guide Rails, Pump Control Systems, Control Panels, and Float Switches to complete your pumping system requirements.