This might need a bit of describing.... on my Hotpoint Aquarius FDW60 Dishwasher, there are two inlet ports on the part of the upper spray arm assembly that mates with the nut & seal on the back of the dishwasher. This is the part that "stabs" in to the nut & seal when the upper rack is pushed back to engage with the port inside the dishwasher that supplies the hotwater to the upper spray arm during operation. Clearly there are two ports on the spray arm assembly, one above the other, to allow a higher or lower positioning of the upper dishwasher rack. Now more specifically, on my dishwasher both these inlet ports are open, and I was wondering if there was a cap, or other type of seal or plug, that covers the unused port? The dishwasher was in the property I've just moved in to, and doesn't clean that great. I'm going to change the nut/seal on the internal back wall supply port, but I also wonder if one of the problems was if some the supply water was simply coming in to the spray arm conduit, and out the unused port instead of going to the upper spray arm. Wordy description there, but I hope you know what I mean. cheers Rob