I have a Delta kitchen faucet with a spray pull out (model 459).
I'm trying to replace the two O rings to make it swing back and forth easier.
I've taken the set screw out of the handle and removed the handle.
The problem is – I cannot remove the cap.
There are square indentations on it, which I have attempted to utilize for removal, with a large crescent and slip joint pliers.
Neither of these will budge the cap.
What can I do to remove this cap.