Walking Beam Flocculators consist of horizontal line shafts, drive units, walking beams, paddle support assemblies, and paddles. The paddles are moved up and down in a reciprocating motion by means of a drive motor, gear reducer, torque arm assembly, connecting rod and riser beam which converts the circular motion of the drive output shaft into linear motion. It can be designed to ensure the entire basin is effected by the flocculation process minimizing short circuiting. This flocculator line shaft can be installed either perpendicular to the direction of the water flow or parallel to the flow.