A vehicle treatment system supports a continuous belt via a support system including an upper frame, grates disposed on the upper frame, and support plates disposed on the grates. The upper section of the belt travels along the support plates, with water and debris from the upper section passing through the gaps between adjacent plates. Collector trays are disposed below the gaps and above the lower section of the belt to collect water and debris that falls through the gaps. A rinsing manifold below one or more of the gaps projects rinsing fluid upwardly onto the underside of the upper section of the belt. Return rollers are disposed below the lower section of the belt, and are attached and removable from the frame structure without the use of tools. The upper frame may be galvanized, and may include separate attached stainless steel leg portions that are weldable.

A sprocket is provided for a carrier link chain system which has a chain and a carrier link. The sprocket contains a unitary body which has three shaped sections including a central shaped section and two outer shaped sections sandwiching the central shaped section. The central shaped section has teeth for moving the chain of the carrier link chain. The two outer shaped sections have protrusions extending from a circumference and defines a path through which sides of the carrier link traverse and preventing a side-to-side movement of the carrier link and the chain links. The sprocket prevents jamming issues currently seen when a carrier link twists and causes the chain to jump off of the sprocket or the carrier link gets jammed against other portions of the conveyor system.

A sprocket for guiding or driving a conveyor chain of a carwash conveyor includes a sprocket ring and first and second support rings flanking opposite sides of the sprocket ring. Flanges on the first and second support rings are spaced apart axially from the sprocket ring so as to form a channel between the flanges that receives drive links of the conveyor chain. The first and second support rings and flanges thereof support a portion of a roller assembly of the carwash conveyor to thereby limit lateral tilting of the roller assembly and/or twisting of the conveyor chain. Also disclosed is a reversible roller assembly including a double-nosed lug, which can be reversed relative to the conveyor chain to extend the service life of the roller assembly.

A vehicle wash system that includes a tunnel having a length extending between an entrance opening and an exit opening, a vehicle wash path extending along the length of the tunnel, a conveyor extending along the vehicle wash path, a beltless roller deck substantially parallel to the conveyor and separated from the conveyor by a distance sized such that the conveyor can receive a first tire of a vehicle to be washed and the beltless roller deck can receive a second tire of the vehicle to be washed, and wash equipment disposed along the sides and overhead of the vehicle wash path. The vehicle to be washed enters the tunnel through the entrance opening, is transported along the vehicle wash path, is cleaned as it progresses through the vehicle wash path by the wash equipment, and then exits the tunnel through the exit opening.