Connects easily to most engine cooling systems-simply connect to radiator filler neck or reservoir tank. No need to cut header hoses or disconnect radiator hoses. Test for leaks-confirms system integrity, reduces chance of refilling a leaky system. Eliminates potential airlock problems-refill cooling system using "Patented" vacuum technology. Refills in seconds-quickly refill from new or used coolant reservoir. Accurately pre-mixes water and anti-freeze in convenient 3 gallon (11.3L) holding reservoir. Safely stores used coolant in a large 12 gallon (45.4L) environmentally friendly holding reservoir. No electrical or moving parts. Easy to operate. Ideal for use with coolant flush chemicals The Most Economical Unit to Evacuate, Test and Refill Engine Cooling Systems. Specifications: . Height: 50 (127 cm). Width: 19 (45 cm). Length: 20 (51 cm). Weight: 49 lbs. (22.3 kg). Shop Air. Requirements: 90 PSI (6.26 bar) 4.2 CFM