What is the best way to remove a compression ring from a copper pipe?

I am replacing a shut off valve under the kitchen sink and the old shut off valve has a compression fitting. I tried to remove it and replace it with a new compression ring that came with the shut off valve. It won‘t budge and the copper piping is to short to cut it off. I need to remove the old one. Any ideas?? Thanks for your help out there

This Site Might Help You. RE: What is the best way to remove a compression ring from a copper pipe? I am replacing a shut off valve under the kitchen sink and the old shut off valve has a compression fitting. I tried to remove it and replace it with a new compression ring that came with the shut off valve. It won't budge and the copper piping is to short to cut it off. I need to remove the.

Those are annoying little pests, but look at the compression ring carefully, it may not need to be removed if there are no dents or gouges in itand if it is in bad shape, you have no choice but to cut the pipe and put a new one on because compression rings are just that, they compress around the soft copper and aren't meant to come off. Sorry for the bad news, but look it over and try to reuse it, if you can. Good Luck!

I got the compression ring (ferrule) off by heating it with a propane torch. Apparently the brass ring expands faster than the copper pipe when subjected to heat. I directed the flame on the ring for about a minute and then was able to slide it right off with a pair of pliers.I'm not sure why it works. Possibly the brass ring has a higher coefficient of expansion than the copper pipe, or perhaps the smaller mass of the ring causes it to heat to a higher temperature than the pipe.