John Dow 6EV-2 Ventura Vacuum Generator for Fluid Evacuators. John Dow 61431-2 Oil Drain Conversion Kit for Pump Evacuation. Fuel Additives. We are not responsible for examining or evaluating the content or accuracy and we do not warrant and will not have any liability or responsibility for any third-party materials or websites, or for any other materials, products, or services of third-parties.