The VFI is the industrial version (4-20 mA output) of the Grundfos vortex flow meter range

DDA 17-7 FCM-PP/E/C-F-31I002FG The SMART Digital DDA is a compact positive displacement

linearity ±4% (FS)

residential building services and areas with large terrain-level differences

DDA 120-7 FCM-PVC/T/C-F-32U3U3 The SMART Digital DDA is a compact positive displacement

pump connection 97691903 The VFI is the industrialSeparate retrofit pump connections for adapting standard Grundfos pumps to installation specific hose and pipe types and sizes. Product numbers for Connections include one connection. Product numbers for inlay kits include inlays for 2 connections