VCX-4 Vacuum Coolant Exchanger, contains four large capacity cylinders, three for new coolant and one for waste. These large capacity cylinders are designed for high-demand applications. Coolant selection and changeover provide flexible adaptation to most vehicles. It comes equipped with a Venturi vacuum generator that can service vehicles in about 5 to 15 minutes. Transparent cylinders help expose precipitants and corrosion products.