When performing standard diagnostic procedures, this tool is to be used as the « clean » or « alternative » fuel source when referenced in the procedures. DO NOT store fuel in the Clean Fuel Source Tool when it is not in use. Includes: x1 Storage Tank, x1 Supply Line (p/n: 15-637-01-02), x1 Return Line (p/n: 15-637-01-03), x1 Supply Adapter (p/n: 15-637-01-04), x1 Return Line (p/n: 15-637-01-05), x1 Supply Adapter (p/n: 15-637-01-06), x1 Supply Adapter (p/n: 15-637-01-07) and x1 Return Adapter (p/n: 15-637-01-08).