Control valve assembly

A water treatment apparatus, comprising:

• a) at least one water treatment tank defining a fluid flow path between a tank inlet and a tank outlet, and including a compartment containing a water treatment material through which water to be treated is passed;
• b) a control device in fluid communication with said tank inlet and said tank outlet for controlling fluid flow along said tank fluid flow path and for controlling the regeneration of said water treatment material in said tank compartment, said control device including:
• i) a housing;
• ii) a pair of venturi chambers defined by said housing, one of said chambers operative to provide a co-current regeneration of said material and the other of said venturi chambers operative to provide a countercurrent regeneration of said media;
• iii) a fluid pressure operated inlet valve for controlling the communication of a source of water to be treated with said tank inlet;
• iv) a fluid pressure operated outlet valve for controlling the communication of said tank outlet with a discharge conduit;
• v) a fluid pressure operated drain valve for controlling the fluid communication between said tank inlet and an ambient drain;
• vi) a fluid pressure operated purge valve for controlling the fluid communication of said tank outlet with said ambient drain;
• and,
• vii) a fluid pressure operated regeneration initiation control valve for providing a fluid signal, under predetermined operating conditions, to a remote control device for initiating regeneration in a tank associated with said remote control device.