Water separator for the continuous separation of water, air and particles, said separator comprising an inlet conduit (5) for receiving a mixture of water, air and particles simultaneously from various sources, such as dental surgeries, etc., and an outlet duct (1) that is connected to a suction motor (13), comprising an upper chamber (3) that is connected to a lower chamber (4) by a valve (7) at the bottom of the upper chamber (3) and a conduit (12) connecting the upper chamber (3) with the lower chamber (4), the lower chamber (4) being normally closed by a check valve (8) at the bottom, characterized in that a valve three-way (10) located in the duct (12) is adapted to establish a connection between the upper (3) and lower (4) chambers in a first portion and closes said connection to the upper chamber and allows air from the atmosphere to the infe chamber rior (4) in a second position, the upper chamber (3) comprising a thick air filter (6) that captures particles from the flow of liquid to the lower chamber, and the lower chamber (4) comprising a level switch (9) adapted to place the three-way valve (10) in the second position when the water level in the lower chamber (4) reaches the level switch (9) and a lower level switch (11) below the First level switch (9), which is adapted to return the three-way valve (10) to the first position when the water level in the lower chamber (4) reaches the lower level switch (11).Separador de agua para la separación continua de agua, aire y partículas, comprendiendo dicho separador un conducto de entrada (5) para la recepción de una mezcla de agua, aire y partículas simultáneamente procedente de varias fuentes, tales como cirugías dentales, etc., y un conducto de salida (1) que está conectado a un motor de succión (13), comprendiendo una cámara superior (3) que está conectada con una cámara inferior (4) mediante una válvula (7) en el fondo de la cámara superior (3) y un conducto (12) que conecta la cámara superior (3) con la c
