When you want to produce high quality water in a demanding and variable environment, trust Culligan® filters. The Culligan Side Mount (CSM) heavyduty filter reduces contaminants* and solids that affect water quality and equipment efficiency. The Culligan®-exclusive Smart Controller makes it easy for you to set up and manage your water treatment. Using optional accessories such as an automatic timer or sensors, monitor the system and filter as needed without constant supervision, saving resources and money.