The direction of rotation of a 3–phase motor can be changed by reversing two of its stator leads. This interchange reverses the direction of the rotating magnetic field within the motor. Like many industrial workshop machines, the Dana-Ridge wetblast units are polarity sensitive, meaning they are designed to work with the motor running in one direction only. Unlike some other machinery in your workshop, it can be hard to recognize the issue with a wetblast pump as they will still technically work in reverse, albeit at a reduced capacity.