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Allen Lepak
Product Manager – Clarification

Tow-Bro® Hydraulic Sludge Removal System

Rapid uniform removal of settled sludge for secondary clarifiers

The unique design of the Tow-Bro®​ Hydraulic Sludge Removal System ensures rapid removal of settled sludge with minimal sludge blanket disturbance. Proven in hundreds of installations as well as exhaustive testing programs, the Tow-Bro system offers simple operation, less maintenance requirements, lower construction and energy costs.

The Tow-Bro Clarifier can also optimize your clarifier for biological phosphorus removal by preventing the release of soluble phosphorus. Evoqua's FEDWA energy dissipating inlet enhances this performance.

 Online Design support is now available!  Fill out the form below to get started.



  • Rapid, uniform removal of sludge results in:
    • Less oxygen needed in biological system
    • No denitrification
    • No bio phosphorus re-release.
  • Maximum solids concentration—A more concentrated RAS results in less RAS flow pumping
  • Minimum sludge agitation—Achieved through a gentle removal action and a minimum of underwater disturbance
  • Balanced hydraulic design—Removes settled solids in proportion to the area covered over a wide range of flows and permits low sludge blankets to be maintained for cleaner effluents


  • Secondary activated sludge clarifier
  • Municipal and industrial wastewater treatment

 additional benefits

  • Effective surface skimming
  • Allows for flat tank floors
  • Flexible operation and maintenance
  • Long-lasting cast iron clarifier drive

 Tow-Bro Clarifier Design Support

​Fill out the form below to access application guidelines, drawings, and specifications for fast-tracking the design process. Tow-Bro® Hydraulic Sludge Removal System