Generally tanker trucks only have one opening, the manway, in the middle of the tanker. If there are other openings, they are usually too small for a nozzle to perform proper cleaning. Even if they were big enough, often times the operator cannot physically get to each end of the tanker to insert a nozzle. Ladders are occasionally used to get to the manway in the center but it is very dangerous to walk to the ends. The 5TM can be easily inserted and removed through the manway, eliminating the need for manually cleaning.