The California-style truck and pull combination allows for increased mobility in tight areas. This DOT-406 combination can get in and out of the smallest gas station you can find. The bolster-mounted truck tank is built with a front-to-rear pitch, while the pull trailer is built as a double taper. This popular combination is maneuverable and will drain completely and efficiently. The pull trailer can also be built with drain troughs and both units can be designed with numerous compartment configurations to help you get the job done.