Magnetic Drive Pumps work by a synchronist Mag drive system due to the attraction of opposite magnetic poles, one set of magnets sits outside the pump whilst the other is present in the liquid. These magnets are separated by a pressure boundary otherwise known as a containment shell or shroud. The exterior magnet is connected to the driver i.e. motor whilst the interior magnet is connected to the impeller. As the motor shaft rotates the magnetic attraction forces the interior magnet to rotate which in turn causes the impeller to rotate thereby pumping the fluid.