A pumper truck is a truck with a large tank and the capability to pump liquids or slurries into and out of the tank. Pumper trucks are used in a number of industries and settings, with the most famous example of a pumper truck probably being the pumpers used by fire crews when they respond to a fire. These trucks can be quite costly, especially when they are purchased with all the options, and they are a specialty item which is often manufactured to order, rather than being kept in stock by a manufacturer.