Water conditioning system

Claim 1

A water conditioning system comprising: means defining a closed loop primary recirculation path for water, a pump in said path for causing circulation of said water in a predetermined direction, a makeup water inlet connected to said path for selectively introducing water into said path, an outlet connected to said path for selectively draining water therefrom, a branch path connected between spaced points along said primary path, a first container, a first additive in said container for controlling a first predetermined quality of water in said path, first flow control meaNs connected between said first container and said branch path, and actuable for admitting said first additive into said path, a second container, a second additive in said container for controlling a second predetermined quality of water in said path, second flow control means connected between said second container and said branch path and actuable for admitting said second additive into said path, means in said inlet for producing a first control signal whenever a predetermined quantity of makeup water has been added to said path, means operatively connecting said first control signal means to said first flow control means for introducing said first additive to said branch path as a function of makeup water added into said water conditioning system, clock means for producing a second control signal at selected time intervals, and means operatively connecting said second control signal means to said second flow control means for introducing said second additive into said recirculating water system as a function of time, said apparatus further including a third container, a third additive in said container for controlling said second predetermined quality of water in said path, third flow control means connected between said third container and said branch path and actuable for admitting said third additive into said path, said means operatively connecting said second control signal means to said second flow control means including means having first and second alternately energized outputs, one of said outputs being connected for actuation of said second flow control means and the other of said outputs being connected for actuation of said third flow control means whereby said second and third flow control means are alternately actuated upon successive occurrences of said second control signal.