After sitting for 8 years I have to think the watersoftener would need rebeded, the spotfree membranes would be junk, pumps pitted from sitting with water in them for 8 years, backflow preventer moving parts froze up, piston solenoids all froze up, diaphram solenoid valves with hard rubber in them which will crack after running a very short time. What kind of shut down was done on the pumps? Was they drained and antifreeze/corrosion inhibitor put in the pumps, all the lines drained, etc?