The Mastercool 43014 Vacuum-Type Cooling System Filler Kit combines a vacuum gauge, shop air connector, air valve, Venturi-style vacuum, conical adapter, coolant hose, and drain hose. This kit aids in refilling new coolant by creating a vacuum within a cooling system. This process eliminates the need to undergo time-consuming air bleeding after refilling new coolant. Designed for passenger and heavy-duty vehicles, this kit minimizes the risk of an engine overheating.

The shop air connector creates vacuum upon connection and the air valve controls the air flow. With the conical adapter, users can connect to a radiator or expansion tank. The conical adapter offers a wide variety of applications for different radiator filler necks. The Venturi-style vacuum connects with the air compressor to create vacuum and the drain hose drains residual fluid in the radiator and tool. The coolant hose allows the user to add new coolant in which a turn of the coolant valve pulls new coolant into the system.