Drainage of cerebrospinal fluid for the management of hydrocephalus by means of derivation of excess cerebral spinal fluid inside the intracranial cavity towards other places where it can be absorbed as the abdominal cavity, the right atrium of the heart or towards drains selected by the doctor. Treatment of: congenital hydrocephalus, communicating hydrocephalus not communicating, hydrocephalus ex vacuo, pressure hydrocephalus normal. The components of the hydrocephalus valve system SOPHYSA are indicated to be used exclusively with SOPHYSA components in the selected combinations according to the needs of the patient and the medical instructions for the drainage of cerebrospinal fluid in the management of hydrocephalus.