The SWOOSH® Drain Gun™ is designed to blow out drain lines instantly. New larger 20 g SWOOSH® CO2 cartridges deliver 800 psi of oil free air to clear the line, with 25% more capacity. Each unit comes equipped with a tapered fitting to work on 3/8 to 3/4 in drain openings. Flexible hose assembly maneuvers through cabinets, coils and hard to reach drains. Reduces labor costs and time on service calls.