UNI-CAST™ UNDERDRAIN

Tonka has developed a line of concrete underdrains called Uni-Cast™. The Uni-Cast™ system comes in two styles, Uni-Cast™ I, pre-cast, or Uni-Cast™ II, poured in-place to form a monolithic underdrain. We have engineered variations of the Uni-Cast™ II to be able to withstand higher differential pressures during a backwash. The Uni-Cast™ system can be supplied with various nozzle spacing also, with or without support gravel.