Perfectly suited for quick and efficient cooling system, flushing. Simply attach it to radiator or heater hoses and youre in business. Also usable in washing engines and even shop floors. (2) simple connections: (1) to shop air and (1) to a typical water faucet. OTC-6043 creates a unique vortex air/water blast for powerful cleaning applications. The tool can also be used to vacuum by turning the venturi inside the gun in the opposite direction. Air flow is reversed to create a strong vacuum.