Ian Stirling wrote:
Christian McArdle wrote:
Someone else wrote, but the attributions were munged:
What are your experiences of unscrewing a 22mm compression joint and
then re-using it without a new olive??

I've done it loads of times. It certainly wouldn't even occur to me to even
change the olive, let alone the entire fitting. I never use any jointing
compound or PTFE on compression joints.

The olive will work harden sooner or later, and stop working so well.

It's a metal-on-metal joint, which should be watertight. After
the initial deformation it should not be necessary to swing on
the spanner when doing the joint up. You can't make a watertight
joint more watertight.