Complete water softener system includes 1.5 cu.ft. of resins per tank ( 10" x 54" ).
Fleck 9100 Econominder twin alternating control valve with cover.
3/4" or 1" stainless steel By pass( you select ) and Brine Tank ( Round with safety float pickup, unless you request "square" brine tank).
You will need to add resins to tanks with funnel provided, then attach valve, and piping connections.9100 valve brochure
9100 ( 9000 and 9500 ) Service Manual