I'm replacing at least the handle of a kitchen faucet (possibly the whole thing). Its the type where the spout is standalone, then there's a separate hot/cold combo handle, then a separate sprayer.
I removed the hot/cold waterline connections coming into the handle, but the line coming out of the handle going to the spout has a strange connection I'm not familiar with. The flexible line connects to a brass looking ferrule connected to a black plastic tee (with the other tee connections going to the faucet and to the sprayer).
I twisted the ferrule, but it just spins. I also tried twisting the line piece going into the ferrule, but couldn't get it to turn. I was being cautious, as I didn't want to break any of the lines, since I may try to keep the spout piece. Any idea what this connection is, and how to remove?
The piece I’m referring to is on the left in the picture, with the steel braided hose coming into it: