Depositos de Agua Canyada Gran is a water tank and filtration firm based in Picassent, in Valencia province. Its Google Business Profile lists it as “Water purification company”.
It has no Google reviews yet, so ask for references from recent customers and, if you can, a finished job you can see.
If you want comparison quotes, the nearest other water tank and filtration firms are Depósito de agua potable de Xirivella in Xirivella (10 km), AquaDux in Valencia (12 km), AQUAfuentes in Mislata (13 km). Getting two or three quotes is normal for this kind of work.