Dramatically reduces cooling system refill time, without mess and without introducing airlocks. No more time-consuming cooling system bleeding and no more messy spills to clean up. Simply plug into the workshop air line, attach to the cooling system header tank and create a vacuum. Complete the process by attaching the filler hose and opening the valve allowing your premixed coolant to flow into the system. Supplied with three adaptors and storage case. - • Dramatically reduces cooling system refill time, without mess and without introducing airlocks. • No more time-consuming cooling system bleeding and no more messy spills to clean up. • Simply plug into the workshop air line, attach to the cooling system header tank and create a vacuum. • Complete the process by attaching the filler hose and opening the valve allowing your premixed coolant to flow into the system. • Supplied with three adaptors and storage case.