After we saw that progressively our dishes were not getting clean we investigated the condition of the spray arms and this upper feed tube assembly. We found a huge crack on the side of this piece and new not enough water was getting to the arms. We also noticed a build up of soap and lime. So we ran a cycle of vinegar and sprayed the filters and arms with lime-off-sprayed them out with a air hose "completely". Many of the small pieces of lime will clog the holes in the spray arms. Attached the new upper feed tube and it is like we have a new dishwasher! no more coffee rings and starchy plates and glasses. Clean Clean sparkling dishes! I continue to get quick dependable service from Applianceparts Pro-even if I find it cheaper elsewhere, I always buy here because I get it lightning fast and always the right part. ( torx screwdriver needed)