OTCs No. 6043 Blast-Vac Multipurpose Cleaning Gun is perfectly suited for quick and efficient cooling system flushing. Simply attach it to radiator or heater hoses and you’re in business. Also useful for washing engines and even shop floors. Just two simple connections - one to shop air, the other to a standard water faucet - creates a unique air/water vortex blast for powerful cleaning capabilities. 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 situations, short blasts are sometimes needed to loosen some contaminants from within the system. Value is at the core of the OTC tool and equipment portfolio. For a simple repair or the most complex drivability concern, these award-winning tools universally solve problems faster, and at better value, than any other product line available. Whether it’s a specialty tool or unique piece of service equipment, OTC provides top solutions to modern automotive service challenges while increasing technicians’ productivity and shop profits.