Abstract: A modular modular control apparatus for a water treatment system which periodically undergoes a regeneration cycle including a backwash phase and a replenishment phase. The modular control apparatus has a modular design which includes interchangeable timer modules, a drive motor module, a drive mechanism, a valve cartridge unit, a brine valve module and interchangeable brine valve levers. The timer modules are rugged and relatively inexpensive but are not adjustable. Thus, to adjust the predetermined interval between regeneration cycles, a different timer module is installed. The drive mechanism includes two camming elements which in cooperation with an interchangeable lever and brine line sealing module draw a brine solution from the brine tank to replenish the treatment media and refill the brine tank with water to form a new brine solution. The use of interchangeable brine valve levers allows the quantity of brine solution used to replenish the treatment media to be easily adjusted.

Abstract: A filter and hydraulic mixing assembly for a water treatment system. The assembly includes two circulation tubes disposed alongside a center tube. During a backwash cycle fluid is conveyed through the center tube to a housing member where it is discharged immediately below the open bottom ends of the two circulation tubes thereby conveying media from the surrounding tank upwards through the circulation tubes. A cap member is fitted over the upper ends of the circulation tubes within the tank and direct the media being discharged from the circulation tubes into a downward spiraling helical flow pattern which provides enhanced agitation and lifting of the media bed. Discrete filter segments are selectively attachable to the housing member and interchanging the discrete filter segments permits the total filter slot area of the assembly to be adjusted and also permits the filter slot size to be altered. The filter segments are color coded, with each separate filter size having a different corresponding color.