Hi All,

I am calling that round compression ring thing that goes
over your toilet's inlet water pipe (1/2" copper?) a nipple.
If I am wrong, please correct me.

Question, how do I get the nipple off when I go to change
the water valve? The old nut is all stripped out and drips
and can't be tightened any more without ripping something.

There is tool for everything, there must be a tool for this?
Or, should I breakdown and just call a plumber?

Many thanks,
-T