Found another spare it is a good idea to carry. Water In Fuel Drane Valve. Either a complete valve or a repair kit. Mine is a '01 CTD and the o ring failed at 100K. Not just a little drip, a steady s...
Just saying, didn't like the fuel leaking out in a steady stream on the motor and I had 150 miles to go. For 17 bucks from Cummins and 15 minutes of my time I avoided a hazardous situation and saved the cost of the fuel.