Eliminate Airlocks!

OTC Tools cooling system refilling guns are a great tool to have in the shop when replacing anything in the cooling system that requires adding coolant. Simple and easy to use, refilling guns connect to a shop air supply, a cooling system opening, and a new coolant container to create a vacuum seal. When connected, cooling system refilling gun will add new coolant to the cooling system while pulling are out, removing any trapped air pockets. Built using quality materials to provide the durability you can count on for many years of service.