14" x 65", 100L Upflow Simplex Water Softener, Clack WS1CI Digital Metered Controller, 1" , 4 m³/hrThe process of a standard downflow softener is that hard water flows down through the resin bed and when regenerating the brine does the same. As a result of this, the top of the bed is regenerated first and some of the hardness travels through the resin and can reattach. However, in a counter current softener, the brine passes down the riser tube and up through the resin bed which results in the resin at the bottom of the vessel getting regenerated