The device is only approved for the SONAX products included in the instructions for use. Furthermore, the device is not suitable for solvents. 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 pump up the device. Any overpressure escapes through the safety / pressure relief valve. Spraying is activated by pressing the push button on the valve body. Depressurise and empty the device after use and rinse with clean water. Emptying and maintenance: Lift the button on the safety / pressure relief valve to release any residual pressure in the sprayer. Lubricating the pump O-ring with SONAX SX90 PLUS from time to time extends the service life of the pump considerably.