A bar screen serves the same purpose as a:

A bar screen is used in wastewater treatment facilities to remove large debris and solids from the influent sewage before it enters further treatment processes. It consists of parallel bars, which allow liquids to pass through while trapping larger materials such as sticks, leaves, and plastic items. This function is similar to that of a trash rack, which is designed to catch and hold large floating debris and restrict its passage.

While a filter operates on a different principle by allowing smaller particles to be captured by a media, a grit collector is specifically intended for the removal of heavy inorganic materials like sand and gravel. A sluice gate, on the other hand, is used to control the flow of water through a channel but does not serve the purpose of removing debris. Therefore, the bar screen and trash rack share the common goal of protecting subsequent equipment in the treatment process from damage caused by larger objects, making them functionally comparable.