Clarkes top quality submersible pump handles both clean and dirty water robust build and a heavy duty impellor means the csv2a vortex pump will not only handle dirty brackish water it39s also able to pass solids up to 30mm diameter and even better it39s fitted with an automatic float switch a simple yet clever device that switches the pump on as the water level rises and switches it off once the pump has done it39s job and reduced the water level