I'm having problems with my 4 year old Clack WS1 water softener. My outside garden faucets work fine but going through my softener, the flow tapers off and has very little flow. It almost stops. When I by-pass the system, my flow is fine. Also, I noticed when the system is brining, it doesn't evacuate all the brine out of the brining tank like it used to. It seems to have a restriction somewhere. Any help would be appreciated.