rick wrote:

seen 2 'tweaks' done by plumbers.

1. remove pipe, wrap 2 turns of PTFE tape around the olive and refit.,
probably would put PTFE tapes around the compression threads as well

2. remove pipe, and smear olives and olive seat with Fernox LS-X joint
sealer.

Thoughts on either approach ?

2. has worked for me.


Though, it has to be said that

3. wind a rag around the valve to stop the dribble running down the
pipe, intend to look at it later, come back several weeks later and the
leak had "crusted up" and sealed itself ...