Perfectly suited for quick and efficient cooling system flushing. Simply attach it to radiator or heater hoses and you’re in business.Also usable in washing engines and even shop floors.Two simple connections one to shop air and one to a typical water faucet.No. 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. Note While normal water pressure will handle the majority of a cooling system flush, short blasts are sometimes needed to loosen some contaminants from within the system.