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Author:
frosteemjj (SC)
I decided it would be simple to do this, but I was the only simple thing involved...
When I insert the barbed portion into the supply pipe from the wall, how much "play" or "wiggle room" should there be? Should it be somewhat difficult to insert the barbed portion?
I am reluctant to use the copper compression because I only have a couple of inches of the PEX supply line sticking out from the wall. I had to cut one of those rings off before I could remove the old valve. @#$%& that I am, I let the guy at Ace throw the old one in the trash, so I cannot test whether the older one moved freely inside the supply line.
If I need to measure something, should I get a caliper and measure in inner diameter or should I measure the outer diameter.
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Author:
packy
no play at all..
use the compression stop. don't forget the insert.
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Author:
frosteemjj (SC)
Thanks for the help.
I don't have an insert, and the one I took off didn't either; however, the "push-on" I bought as my first try had one (about two inches long, with a "lip" (???) one one end). That one leaked like crazy, but it did not have the "barbed" insertable end.
Right now, I have the leaky one on just so I can get water, and I'm just catching the overflow in a pan.
Just to make sure, PEX is a plastic-like pipe? The copper ring fit over it perfectly.
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Author:
packy
the pex insert looks like this but it is stainless steel.
i've used hundreds of compression stops on pex and never had a problem.
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Author:
jimmy-o (CA)
Packy...are you partaking in the festivities in Byfield this weekend? Even though it is my 50th, I couldn't convince myself I needed to attend. I guess I will just read about the events later on!
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Author:
frosteemjj (SC)
Packy...
Thanks for taking the time to be helpful and also not condescending to someone with my lack of knowledge.
I have decided to just call in a plumber, since it appears the water infeed isn't the usual stuff. It is thin-walled and is is not nearly as "stiff" as the PEX I looked at today at the Ace dealer.
I'll use my waiting time to just work on something I actually CAN do: I'll clean up the clutter in my guest room. 
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Author:
SwimRunPlumb (MI)
packy, just out of curiousity, why do you use compression stops on pex? Why not just use a pex stop?
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Author:
North Carolina Plumber (NC)
You probably have polybutylene coming out of the wall. A pex fitting will be too small to work properly, a transition crimp coupling would fix it.
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Author:
packy
no jimmy, i'm not.
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Author:
hj
The biggest reason would be that it will have to be replaced someday.
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Author:
SwimRunPlumb (MI)
Good point, I can't believe that never crossed my mind. I typically always try to think of the next guy too. Guess I will just start cutting the stub outs a little longer from now on.
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Author:
hj
Or use compression valves.
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