VEVOR 110V DEF Transfer Pump Kit, 10.5 GPM, Diaphragm Self Priming Electric Water Pump for Diesel Exhaust Fluid Urea, with Mounting Bracket Flow Meter Automatic Nozzle Hose, for Liquid Transportation

To change the readout on your flow meter from liters to gallons, please follow these steps: Instructions: Press and hold the "RESET" button for several seconds until the unit on the display changes from Liters (L) to Gallons (GAL). If the unit does not change, press and hold both the "RESET" and "CAL" buttons simultaneously to enter the setting mode, then use the "RESET" button to toggle to the desired unit.