I don't think it's a compression ring. I think it's part of the pipe that been enlarged.
Everything looks different from where I live. Where do you live?
Don't knock yourself out. Just replace the washers in the original valve, if you can, and replace the original double valve. If you ever have to turn off the water again and either half of the valve doesn't work well enough, you can do what you did this time.
It is probably too late because you have been screwing with it and buggered it up by now but you usually leave the old ring and compression nut there and screw on the new valve using the old ring and nut. You are pretty much down to cutting the pipe off at the ring and hoping there is still enough to take a new ring.
First, altho as gretwell said in other response w/ broken link so not in thread, once he's mucked on it to the point has it probably won't seal again, the real plan was to have left the compression ring in place and just replace the valve with the new one.
Might as well try that still and see if it will hold. If get luck, done.
If not, can next attempt to cut off the ring and go for it with new one but that's likely not going to work, either, because the compression ring has deformed the pipe by shrinking OD where it is and a little enlargement where it isn't--which is why they won't slide off.
The feed line is possibly M instead of L which exacerbates the problem because the thinner wall deforms more easily.
Next after those options is to cut at the ring and if there's enough length can get by by just using what is left; better option there would be to use a sleeve and a short extension of hard copper.
Last resort is to open the cabinet back or, if is against interior wall w/ access behind, open up the wall on the other side and go back to the elbow there.
Agree w/ gfretwell's likely assessment (see another posting) but the puller arms are way too long for the application.
It's not likely you'll be successful in pulling the ring anyway if it doesn't move readily after a little pressure as that indicates the pipe is significantly deformed.
See the other for the full sequence of options I see, but the first is to just hope you've not screwed up the present one too badly and just reuse it. Unfortunately, at this point that's likely going to leak because have bunged up the ring so it won't seal...
That is what you said. I guess I had things on my mind.
Actually, no!
So it does. In fact the new one seems to me to be enough like the old one, so now I'm back ALMOST to my original recomendation: Leave the nut the way it is and just attach the new valve to the old nut.
I would have said that in the very first place -- no point to changing the nut =- and afaict it's not to late for that.
IIUC DPB thinks that won't work but gfretwell and Thomas think it's too late to get rid of the compression ring.
Using the old nut and new valve is certainly the next thing I would try. Even if the shape has been changed by his mucking around, won't tightening the valve on change the shape back to what it should be?
The likely problem is by pulling against the edge with the puller it will have created ridge or scratched the compression ring to the point it will not seal water tight any longer.
As said, it's certainly the first thing to try and if hasn't been TOO rough on it, it might just work; I'd just not put very high odds on it at this point.
If had just taken the nut loose, and swapped in new valve body before trying so hard to get the old one off, odds are very much in favor.
Now, my best guess is "not so much!". But, again, yes, it's the first thing to try and hope for.
Coating the outside of the ring with a little grease (vaseline works well and is often around the house) before putting back together can work to fill just a tiny little scratch or two and keep from leaking if it isn't really badly deformed or scratched deeply.
Thank you gfretwell for being one of the rare posters to this home-repair newsgroup who acts like an adult, and who is therefore purposefully helpful by supplying on-topic suggestions and comments (all of which I agree with).
The number of childish worthless posts in this thread alone is sad in and of itself, where your post is refreshingly that of an adult.
As I always report back promptly, I solved the problem today using a method I found in YouTube but where, in hindsight, I DEFINITELY would have just left the old nut and compression ring on and re-used it with the new valve, as you and others suggested.
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This was my first compression fitting, where the lesson learned is that there are three fundamental options, preferably in this order: a. Re-use the old compression fitting & nut b. Pull the old compression fitting off & use all new parts c. Cut the old compression fitting off, taking care not to damage the pipe
These methods are all shown in this excellent video below:
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As you and I are both purposefully helpful and we stay > Agree w/ gfretwell's likely assessment (see another posting) but the
Also thank you dpb for not only being purposefully helpful, which is rare on Usenet these days, and particularly rate on this newsgroup to find an actual adult posting, but also for staying on topic with your purposefully helpful response (which is refreshing, from one adult to another).
As you noted, the "patent pending" Home Depot puller doesn't work as well as one might think it would, based on reports on the net when I searched.
But there's a trick, as shown in this snapshot after it worked:
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Once I used that trick, the result was a bare pipe sticking out:
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Here is a detailed picture of the disassembly results:
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As noted the replacement valve could have re-used the old compression gear:
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Amazingly, _multiple_ videos showed the same strange situation-dependent flaw with the Home Depot tool's puller arms, where there is "something" in the geometries of "some" situations, which nullifies the action of the finger on the puller - which needs to be removed - and only _then_ does it work for the final quarter inch of necessary movement, as shown in detail here (you can skip to 85 seconds for the data-dependent details):
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For some strange reason, the Home Depot tool works on some, but on others, it is badly designed for the particular configuration of my pipe, as it bottomed out with the arms in place.
The "cutting off the wedding ring" method shown in the video below at time point 511 seconds would have worked fine, but, in the future, I'll strongly consider just re-using the old compression fitting & nut.
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It doesn't leak, but now the dishwasher is spraying water into the sink through the aerating valve, so I have to see if the checkvalve on the "Y" shaped aerator is broken or if the garbage disposal unit hose is blocked.
But that's a separate topic altogether... as are the hinges on the dishwasher.
Everyone in this thread attempted to be helpful, even if some were also critical or sarcastic. A liitle sarcasm can be the price you pay for free advice.
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