Patent ID: 8221616

Claim:
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 regeneration control turbine forming part of a regeneration control subsystem; iii) a nozzle for directing fluid into an impinging relationship with said turbine for producing rotation in said turbine; and, iv) structure in said housing defining a passage communicating said nozzle with an external port on said housing, said port adapted to receive fluid from a source external to said valve in order to provide a driving force for said turbine; and, iv) a fluid pressure operated control valve which is selectively opened in order to provide fluid to said passage from a source within said housing whereby a sustaining fluid flow to said regeneration turbine is provided.