Valentina Zuin defended her PhD last year and someone took the opportunity to film her presentation. It is really worth watching if you want to better understand water supply in Maputo, especially in the peri-urban areas and in the informal settlements. In detail, Valentina studied the water resale market in the city and she shows that resellers do not behave as entrepreneurs and that they are not motivated principally by profits. According to Valentina, these people are typically selling water to i) obtain cash to meet daily subsistence needs, ii) as a form of social insurance and/or iii) to help neighbours.
For some reason I cannot embed the movie in this post but you can find it here.