Clarkes truly heavy duty, industrial quality submersible pump benefits from a corrosion resistant stainless steel drive shaft and body. It also has a sharpened, tungsten carbide cutter plate to chop and reduce any water borne sewage or vegetation. This enables the HSEC651A to happily pump dirty water, even sewage water, all day long and for cost conscious, economic operation, it’s also switched on and off automatically, thanks to the inclusion of a simple but effective float switch – as the water level rises this activates the pump; and turns it off once desired water level has been reached.