So at this particular location, the manager has TAPED UP the water tan on the soda fountain. She says "there's a rusted pipe and there's no water." First of all, if they're really is a rusted pipe, doesn't that mean it'd affect the rest of the kitchen and any food they put out?
Secondly, how can there be soda in the fountain, but no water? The way the soda fountain works is it adds the soda or tea flavor syrup to the water. This means that if there's soda, there's water, and if the water is "rusty" then the soda would be too. However, she has no objection to selling soda.
Either this is a petty trick so she doesn't have to hand out cups for free water for customers buying food, or there's an actual rusted pipe and the business is still operating despite the contaminated water, both scenarios are pretty bad.