The Plumber Style Body is essentially Service Body with a roof on it. It is used by many different industries, not just plumbers, but plumbers made it a popular body. It is a very useful body because you can generally stand up inside the body and have storage shelves on the inside all out of side and lockable.
The service body compartments on the outside hold a lot of tools, small parts, hardware and you name it. You get the best of a van body and a service body all in one vehicle. This body can be mounted on any chassis type including the cutaway chassis, conventional and tilt cab chassis.