Water pumps for baths, spas, whirlpools, Japanese baths (ofuros), pressurization of home water piping systems, pressurization of passage or accumulating water heating systems, pressurization of electric, gas or solar heating systems, clean water circulation, irrigation and decoration, drainage of boats and watercrafts, repression of hot water in closed or non-closed circuits, repression of frozen water in refrigeration circuits, and repression of water in lakes and vivariums