Fleck 5600SXT Water Softener Valve Digital Metered On Demand Replacement Head Fleck 5600SXT Digital Water Softener Control Head, battery backup Compact Turbine meter & cable included free of charge. Metered on demand water softener valve. Digital meter for highest accuracy! For water softeners only, we have others if you need something for filter only system You will need a yoke or bypass valve if you do not currently have one 5 year warranty, Fleck valves, the most dependable water softener valves on the market!