• Dramatically reduces filling time and eliminates airlocks in cooling system • Utilizes deep vacuum technology to eliminate airlocks during cooling system refilling • Eliminates the need for system bleeding • Universal attachment to most radiator and header tanks • Small & large rubber cones to suit both passenger & commercial vehicles; no additional adapters needed • Eliminates coolant spills and waste • Integrated vacuum gauge automatically tests cooling system for leaks • Integrated filling tap and vacuum check valve removes the need for interchanging hoses • Quick release air supply locking trigger for easy use NOTE: Does not drain coolant from system