AquaKing Submersible Pump These pumps will move large amounts of water and come at a great price. With self priming float switch. This means that you can use this pump in a reservoir and the pump will not be activated until the water in that reservoir reaches a level where the float switch is lifted. This type of pump is ideal in the waste tank of a run to waste system. When the waste water reaches a set level it will automatically activate the pump and pump away waste water.