Scott S Duncanville , TX August 21, 2017 Appliance: Frigidaire Dishwasher FFBD2406NB3A Frigidaire Dishwasher Ffbd2406nb3a: The upper spray arm tube was leaking and needed to be replaced. How to replace Delivery Tube Gasket. Replaced the upper spray arm tube with a new one. Also replaced delivery tube grommet and the delivery tube gasket. Now everything works fine and no more leaks. 7 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes