Cam and groove fittings are commonly available in several materials, including stainless steel, aluminum, brass, and polypropylene. Because there are no threads to become fouled, cam and groove couplings are popular in moderately dirty environments, such as septic tank pump trucks and chemical or fuel tanker trucks. The system is especially well suited to a situation where frequent changes of hoses are required, such as for petroleum trucks, etc. As examples of industrial application, cam and groove fittings can be used in a system where rapid filling of chemical drums takes place, or by factories that have needs of dye, paint, and ink medium transfers.