Our fire vacuum tanker trucks are built with vacuum pumps capable of self-filling the tank at rates up to 2000 GPM. The tanker can fill itself from up to three separate suction inlets. Osco fire vacuum tankers will turn any unconventional source of water (rivers, lakes, ponds, streams, swimming pools, ditches, etc.) into realistic, usable sources of water. Trucks can be built with a separate auxiliary or PTO driven pump for firefighting and transfer operations.