Fleck 9000 3/4 Inch Meter On Demand Control Valve Twin Tank Water Softener 64000 Grain Capacity (Each Tank)

(If you have a bypass already in your plumbing, then a yoke provides a direct connection. If you don't have a bypass, then select the appropriate size of either the Noryl Yoke with Noryl Bypass or Stainless Bypass. The Noryl Yoke and the Noryl Yoke with Noryl Bypass provide a male pipe thread connection while the Stainless Yoke and Stainless Bypass provide female connection ):

(NSF Approved High Capacity Cation 8% Crosslink Softening Resin (Imported) The default softening resin we use in our residential water softeners.  This is an excellent grade softening resin that removes hardness and up to 3ppm of clear water):