Plumbing – How to disconnect this brass fitting on the kitchen faucet

kitchen-sinkplumbingplumbing-fixture

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:

enter image description here

Best Answer

The braided hose is attached to the black plastic fitting with a push-fit connector.
The locking part is inside the brass 'ferrule' on the end of the hose, and to release it you need to pull the light-grey plastic ring back in towards the ferrule (away from the black plastic fitting).
The hose should then just pop off as you're doing that.

enter image description here