In the early 1960s, a company was set up to bring water from the Vallès (around the Caldes stream and the river Ripoll) to Barcelona. The promoter was Andreu Marí, but the work was financed by the banker brothers Manuel, Ignasi, Jaume and Casimir Girona. Another important partner was Josep Rosich i Jené, who in 1864 gave a boost to the work, which had not yet got off the ground. In 1869 the project was declared to be of public interest. The works went on until 1875.
The pipeline, which was 20,218 metres long, started at the Can Tintoré estate in Barberà del Vallès and was to end at a reservoir in Guinardó, which was never built. To deliver the water, underground tunnels were built in many sections and overhead aqueducts in others and, as there was no reservoir at the end of the route, the water was injected directly into the distribution network; the surplus water could not accumulate and was drained into the Guineu torrent. Construction was delayed several times and, in 1876, the Girona brothers negotiated the merger of the two companies with the Compañía de Aguas de Barcelona (CAB, Water Company of Barcelona). CAB was the owner of the Dosrius aqueduct, which in Trinitat Nova coincided with the Vallès aqueduct and from this point onwards they ran parallel. Negotiations dragged on due to a series of controversies and disagreements and, finally, in 1881, CAB bought the assets of Aigües del Baix Vallès. The water coming from the Baix Vallès pipeline was introduced into the Dosrius pipeline at the point where it coincided in Trinitat Nova and was collected in the Horta-Guinardó Water Park, and the channelling section between Trinitat Nova and Guinardó of the Vallès pipeline fell into disuse.
In 1882, the Compañía de Aguas de Barcelona was taken over by the Sociedad General de Aguas de Barcelona (General Water Company of Barcelona), the parent company of AGBAR. These conduits were in operation until the 1980s, but with decreasing use.

This section of the Vallès aqueduct is located in the Parc Central de Nou Barris. Three large semicircular arches support the passage through which the water used to flow. This channelling is now open and passable. On both sides of the arches, pilasters run along the wall until they reach the water control towers. These are quadrangular in plan, open on the sides that open onto the aqueduct and with small round-arched windows in the side walls and a cornice at the top. On one side, next to the pilaster, there is a small semicircular arched opening. The facing is made of irregular masonry with some brick elements such as the soffit of the arches, the corners, the cornices...