TFT vFLOW Vibrating Flow Indicator - VF1200E Adjustable flow set points of: 95, 125, 150 or 175 gpm, 1.5" NH Female Inlet and 1.5" NH Male Outlet The vFlow makes a distinct vibration that is felt by the hose crew when their charged line achieves a predetermined minimum target fire flow. The field adjustable set point is easily changed to meet your operational standards and is factory set at 150gpm. The vFlow can be used with all types of handheld nozzles; automatic, selectable flow, fixed orifice, or smooth bore. It can be installed directly behind the nozzle or behind a two foot length of hose when used with smooth bore and low pressure nozzles. Vibration comes from a water powered turbine, which means no electronics or batteries to replace, and generally no maintenance. The vFlow is made of rugged hardcoat anodized aluminum with reflective labeling.