The device is only approved for the SONAX products included in the product recommendation list (last page). To fill, unscrew the valve body from the container by turning it anti-clockwise. Fill container, see scale for maximum quantity. Screw the valve body back in and pressurise the device. Maximum pressure is reached when any excess pressure escapes via the safety valve. Spraying is activated by pressing the push button on the valve body. Depressurise the container by turning and holding it with the base facing upwards. Now, press the push button until the excess pressure has escaped from the container.