- Model II - Filter Underdrain

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Accessible MULTICRETE™ II Filter Underdrain. MULTICRETE II Underdrains provide a high quality, low cost, engineered product that is economical and versatile. MULTICRETE II Underdrains provide a low headloss underdrain with plenum access. MULTIWASH® backwash is possible using this system.

The MULTICRETE™ II underdrain is a monolithic cast in place underdrain with open plenum design.  It can be designed for media retaining or support gravel applications.  Special nozzles allow for combined air/water backwash or water only backwash.

The accessible MULTICRETE™ II underdrain allows interior inspection after installation.  The open plenum design provides for uniform distribution at high rates of air and water during backwash.  It readily combines with the unique MULTIWASH® baffle to provide unlimited air-water backwashing.  MULTICRETE™ II is NSF Standard 61 approved.

Features

  • Corrosion resistant materials
  • Open plenum design
  • Media retaining design
  • Monolithic formwork construction

Benefits

  • Long product life
  • Lower headloss
  • Greater hydraulic capacity
  • Access to underdrain
  • Eliminates support grave
  • Reduced filter depth
  • Fewer people needed to install
  • Structural strength with few joints

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