Conversion Solution – Convert tradition valve outputs to 2-wire decoder path – Revolutionize and Expand and Add Flow. Save money, utilize decoder pathway, 48 valves, 10 simultaneous valves. The TDI-F supports flow monitoring. Retrofit like a pro! The TDI retrofits any conventional controller with 2-wire capabilities This allows you to take the central control platform that you currently use and add the cost effective 2-wire control. Using your traditional outputs wired into the TDI creates the conversion to 2-wire saving as much as 80%.