The message
from "." contains these words:

Well, I've never had a compression joint leak and those I've taken
apart have all had the olive pressed into the tube slightly. If that
isn't deformed I don't know what is.
I'm using "deformed" in the sense of "taken beyond its elastic limit".
You may be using some other meaning.

perhaps deformed was too strong a term for /compressed/ ?

No, compressed is something different. To my mind it implies the ability
to spring back, which pipe won't do after an olive has been squashed on
to it.

--
Skipweasel
Pay no attention to that man behind the curtain.