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Patrick Harden, P.E.
Product Manager

Gravisand® Filtration System for Wastewater Effluent Polishing

Industry-leading efficiency in design, installation, operation, and total cost

Gravisand®​ filtration technology incorporates the principles and advantages of conventional traveling bridge designs but uses improved methods of accomplishing and maintaining filtration and regeneration. Gravisand Systems are a favorite among wastewater treatment plant operators because of their exceptionally low life-cycle costs and their legendary effectiveness in wastewater applications.



  • Suspended growth systems
  • Attached growth systems
  • Phosphorus removal
  • Water reclamation
  • Algae removal

 key benefits

  • Prevents media leakage and irreversible fouling
  • Provides maximum media cleaning without ancillary mechanical equipment
  • Eliminates seal face wear and side loading of the traveling bridge
  • Accomplishes superior cleaning by allowing the bridge to remain stationary at the index point
  • Conveniently retrofits ineffective filters to the Gravisand technology
  • Saves on installation and equipment costs by eliminating the need for cell dividers


  • Unique tubular underdrain
  • IAS System
  • No-wear backwash shoe
  • Indexing System
  • Bolt-in upgrade option
  • XCELL configuration Gravisand® Filtration System for Wastewater Effluent Polishing