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 contact product expert

Patrick Harden, P.E.
Product Manager

DAVCO Continuous Backwash Sand Filters

Ultimate reliability in gravity filtration
​The continuous backwash upflow sand filter is an ideal technology for tertiary nutrient removal. The deep bed upflow approach allows the filter to operate continuously, as backwashing of the media is an integral part of the filtering process. In addition, the continuous backwash sand filter is easy to operate and allows for mechanical, chemical, and biological filtration processes.



  • Municipal Wastewater
    • Tertiary nutrient removal
  • Industrial and Process Water
    • Surface water
    • Groundwater
    • Sidestream biofiltration for cooling water systems
    • Wash water or other process streams can also be filtered with the CBS filter as part of an overall integrated reuse design and is ideally suited for precipitation and filtration of metals.

 key benefits

  • Low-cost operation
  • Simple to operate
  • Allows for mechanical, chemical, and biological filtration processes


  • Options for concrete, stainless steel or fiberglass tanks
  • Deep bed filtration, up to 120 inches
  • Phosphorous removal to low levels
  • Denitrification and nitrification options
  • Utilization of in bed flocculation for tough solids removal applications
  • No moving mechanical parts
  • Robust airlift, washbox, and distribution system requiring no replacement spare parts DAVCO Continuous Backwash Sand Filters