No other wash-water treatment system is as versatile and modular as the CL series. The six models can stand alone or be matched with a Filter The CL_30 , for instance, can pre-treat wastewater as a solids separator The CL-600D is designed to treat and discharge waste water to the sanitary sewer. The CL-6032 Models are full Recycling Systems when matched with the modular Filter Pac III Oil Water Separators Pac III module to serve as a solids separator, a treat-and-discharge unit or a recycle system.