Brushless DC water pump using the principles of permanent magnet brushless DC motor, coupled with an impeller on its rotor, the housing structure is designed to constitute a cavity fluid flow, characterized by security, because there is no carbon brush friction, there is no spark, high efficiency, low power consumption (energy-efficient, effective power up to 70%); compared with a long brush motor life (up more than 10,000 hours), low noise (50 db or less one meter).