Depositos Hidralia is a water tank and filtration firm based in Rincón de la Victoria, in Málaga province. Its Google Business Profile lists it as “Water utility company”.
It has a Google rating of 1.0 from 1 review. That is too few reviews to say much yet, so ask for references.
Other water tank and filtration firms within 20 km include Dinae Aqua (AguaNature) in Málaga (10 km), Poliester Kiko in Vélez-Málaga (13 km), Depósitos de Agua y Bombas de Presión Domesticas Anti Cortes de Agua in Vélez-Málaga (13 km). Getting two or three quotes is normal for this kind of work.