This is a replacement valve for a dual tank softener. The 9100SXT digital twin tank valve connects two water softener tanks for automatically alternating between tanks as needed. The valve is constructed of a very durable fiber-reinforced polymer (see the 9000SXT valve for brass construction). The This includes the 3/4" flow meter, but DOES NOT inlcude the tank adapter kit for the second tank. Please indicate your tank diameter under the "Options" tab. Product Features Fleck 9100SXT Digital dual tank head replacement head. DOES NOT include the second tank adapter. Durable Fiber-reinforced polymer construction. For the brass construction, look at the Fleck 9000SXT valve. For Water Softeners Metered control with brine draw for dual tank water softeners. Please indicate your tank diameter under the "Options" tab above. Metered Measures water use and regenerates on demand. Includes 3/4" flow meter assembly Digital LCD display and touchpad controls for extended control efficiency LCD Display At a glance information and simple interface Day-Override Ensures minimum regeneration requirements for best performance Cycle Control Control each portion of the regeneration cycle Product Description For water softeners Replace your old, worn out, or non-functioning control valve with a new, efficient metered control valve made by Fleck, the #1 manufacturer of control heads in the U.S. The Fleck 9100SXT is a popular choice for large homes or small to medium commercial applications. The high flow valve designs allows for high flow rates with minimal flow restriction. is one of the most popular control heads found on dual