System used to prepare powder polyelectrolyte solutions completely automatically. The unit is used for automatic preparation of flocculants to flocculate suspended particles present in the wastewater. Operation of the unit is simple and reliable ensuring a high quality end product. The control panel allows the operator to have an optimal final product. The coagulant/flocculant powder is dosed by a screw feeder. In the first step, the powder is diluted with the inlet water and the resulting solution enters to bottom of the tank. Mixture flows to a second tank called curing, and then to third storage compartment. The slow rotation of the agitator keeps the solution moving all the time.