Water separator for continuous separation of water, air and particles, said separator comprising an inlet pipe (18) for receiving a mixture of water, air and particles simultaneously from various sources such as dental surgeons etc. an outlet pipe (22) connected to a suction motor (23), an upper chamber (2) which is connected to a lower chamber (3) via a valve (17) in the bottom of the upper chamber (2 ), closing the lower chamber (3) typically by a check valve (8) in the background, a three-way valve (24) located in a connecting pipe air (20) which is adapted to establish a connection between the upper (2) and lower (3) in a first position cameras and closing said connection to the upper chamber and allow atmospheric air to enter the lower chamber (3) in a second position, and the upper chamber comprising (2 ) a coarse filter (4) trapping particulate liquid flow into the lower chamber (3), characterized in that the water separator comprises two tanks, a primary tank (1) and a safety tank (11), which are connected through a connecting tube (19) from the upper chamber (2) the main tank (1) to the safety tank (11) and through the connecting pipe air (20) from the lower chamber (3) in the main tank to the safety tank (11), that the inlet tube (18) passes through the top of the main tank (1), that the outlet pipe (22) passes through the tank cap safety (11), and the safety tank (11) is normally closed by a check valve (15 ) in the background.Separador de agua para la separación continua de agua, aire y partículas, comprendiendo dicho separador un tubo de entrada (18) para la recepción de una mezcla de agua, aire y partículas simultáneamente de diversas fuentes como cirujanos dentales etc. un tubo de salida (22) que se conecta a un motor de succión (23), una cámara superior (2) que se conecta con una cámara inferior (3) mediante una válvula (17) en el fondo de la cámara superior (2), cerrándose la cámara inferior (3) normalmente mediante una válvula de retención (8) en e
