The schematic diagram of permanent magnetic field PMT system. Where (1) Tank: contains a quantity of brackish groundwater that was supplied here for this experiment. (2) Three-way ball valve shuts off the water flow in one direction and opens it in another direction. (3) Gate valve (ball valve, 2 ports): normally open. (4) Centrifugal pump. (5) Check valve (swing check valve, 1 inch): non-return valve used to protect the pump from backflow. (6) Gate valve (ball valve, 2 ports): throttling the flow rate. (7) PWT device: used for treating brackish groundwater (salt content up to 3000 ppm ± 500). (8) Three-way valve. (9) Three-way valve. (10) Reservoir.