QUESTION: One of our trucks has a 250-gallon freshwater tank that is rusting inside, which is a problem when we have to fill sinks on a service route. There is only a 2-inch fill opening on top so we can’t get inside. Is there an additive or treatment we can use to remedy the problem or do we have to cut a trapdoor into the tank?James Lavarone
Mill Valley, Calif.ANSWER: You’re not the first portable sanitation contractor to encounter this situation. When it comes to ensuring clean water, there is no quick fix when rust starts attacking carbon steel. Many freshwater
