Patent ID: 7875170

Claim:
A treatment system comprising: a holding tank for a source liquid; a pump having a pump inlet for the intake of said source liquid from said holding tank and a pump discharge; at least one conduit connected to said pump discharge; a liquid dispenser connected to said at least one conduit, said liquid dispenser comprising: a container for a treating liquid; a feed conduit having a first end in open communication with said container and a second end; a dosing chamber having an upper portion operatively connected to said second end of said feed conduit, said upper portion of said dosing chamber having a vent for breaking any air lock in said upper portion of said dosing chamber; a first valve connected to said upper portion of said dosing chamber, said first valve comprising a first valve element being floatable in said treating liquid, and a first valve seat, seating of said first valve element on said first valve seat preventing flow of treating liquid through said first valve; and a second valve connected to said first valve, said second valve having a second valve element and a second valve seat, said second valve being connected to said at least one conduit; whereby activating said pump results in the flow of at least some of said source liquid in said holding tank through said at least one conduit inducing a pressure against said second valve element to force said second valve element into seating engagement with said second valve seat and unseating of said first valve element into a floating condition in treating liquid in said upper portion of said dosing chamber and stopping said pump results in unseating of said second valve element and flow of treating liquid from said dosing chamber through said first and second valves into said at least one conduit.