Patent ID: 8741148

Claim:
A water treatment system comprising : a) a reverse osmosis module having an input for source water to be treated, a permeate output and a concentrate output; b) a reverse osmosis control valve for controlling the communication of the source water with said reverse osmosis module input; c) a feedwater biased storage tank for storing permeate produced by said reverse osmosis module; d) a feedwater control valve for controlling the communication of said source of water to be treated with a feedwater chamber located in said storage tank and formed at least partially by an elastomeric member; e) a tank pressurization control valve for controlling the opening and closing of said feedwater control valve; f) a flow control for restricting the flow of a signal pressure to a signal pressure chamber in said feedwater control valve, said restrictor for reducing the rate at which a fluid generated force is applied to a valve operating member forming part of said feedwater control valve and, g) a check valve configured to be in a parallel relationship with said restrictor which allows a fluid generated force on said valve operating member to be released substantially immediately when said signal pressure is terminated.