Thompson Pump’s hydraulically driven submersible pump ends and hydraulic power units with automatic start/stop are designed for sludge dewatering. The submersible pump ends provide energy savings, eliminate suction lift limitations, and enable pumping in deep excavations, manholes, open pits, quarries, or mines. The 32HPU with a 46HST handles solids up to three inches, has a maximum capacity of 1,580 gallons per minute, and pumps efficiently at heads up to 115 feet. Designed to run dry without damaging components, these models are constructed from heavy-duty cast iron and steel for durability, high reliability, and maximum versatility. Typical hydraulic power units require manual start and stop, manual needle valve adjustment, and manual speed adjustment. Thompson’s automatic start/stop system energizes and de-energizes the hydraulic circuit while automatically adjusting the speed of the hydraulic power unit. Therefore, is minimizes labor costs and allows for considerable fuel savings. The automatic throttle control allows the engine to warm up and cool down, thereby reducing engine wear.