The Fleck 2510 SXT Digital control valve for back-washable filters has a digital electronic meter that regulates water usage through electrical pulses.   This is an excellent choice for larger homes due to its 19 GPM continuous, 24 GPM peak flow rates.

Fleck's new SXT controller is the next generation control valve.  This replaces the past SE platform.  The SXT features the same basic functionality as the SE, but has a larger backlit display, new diagnostic view, improved programming, and a power backup of over 48 hours. Injector/drain modules contain the brine valve, flow controls and injector are removable from the valve's exterior
The timer is built with rugged 3/8" wide gears
The controls are user friendly and easy to program
The valve body is constructed of non-corrosive, UV resistant, fiber reinforced polymer
Economical, low power consumption
Easily replaceable components
Large LCD with 48-hour capacitor backup, for power outages