Ritchie Engineering Company, Inc. introduces the YELLOW JACKET Coolant Exchange/Flush System 37505 for vacuum drain/test/fill, pressure test, coolant exchange and forward/reverse flush in one convenient and easy-to-use system. A total of 24 gallons for new coolant and a 16-gallon "used coolant" tank place this compact 40-gallon unit at the top for total capacity compared to any other system for cars and light duty trucks.