Solid Contact Clarifiers Neo Tech Water Solutions are supplying the industrys highest quality and most reliable clarifier mechanisms for basic bridge or pier supported mechanisms to those with the most complex and demanding special requirements. Our drive units are high performance and deliver high torque. Standard Designs exist for basic mechanisms for a wide range of tank sizes. These standard mechanisms are effective, low cost and meet all design codes with minimal engineering costs. Bridge supported mechanisms are supported by a structural bridge that spans the tank diameter and is generally used for the lower end of the range of clarifier diameters.