The Husky HVAC Condensate Drain Line Blaster packs cleaning power into a small, lightweight package. The small compact nature of this tool eliminates the need for carrying heavy air or nitrogen tanks. Husky Drain Line Blaster uses carbon dioxide (CO2), a common component of air, and is totally safe for use in the environment, and is a wonderful alternative to the environmentally unfriendly practice of using refrigerant to clean the drain line.