The destoner is built up in two sections: an infeed hopper and a settling compartment. This system uses a very high water flow rate (adjustable) to achieve perfect separation of rocks, lumps and dirt, yet treating the product (like woodchips) gently. The produce will float and the rocks/lumps will go to the bottom (trough the water flow) to be discharged by the rock outfeed conveyor. The settling compartment is equipped with a smart dirt removal system, which filters the sand/soil/clay out from the water. Due to this system, the machine requires only a little fresh water to operate.