Radiator valve - very intermittent weeping

[zebedee]

HI,

Recently replaced a radiator and thought there were no problems. After a week the compression joint between the TRV and radiator tail started weeping so I just slightly tightened it up and that seemed to do the trick.

Been working away for a couple of weeks and during this time the wife'd reported that it's been weeping again, a miniscule amount (1 or 2 drips onto kitchen paper) and then nothing for a couple of days, then another drip, nothing for a day or so etc......

Do I just keep tightening the thing up a little at a time and see if it fixes it or does this intermittent nature mean there's something fundamentally wrong so I might as well dismantle and redo from scratch now?

Thanks in advance for your thoughts.

 

[hi-spec plumbing heating]

if it's slowed the drip give it another go if not take it apart maybe a damaged olive or tail.

 

[bengasman]

Admittedly, I consider doing the following a botch job, but is has been known to do the trick sometimes.
Loosen compression nut of offending valve and slide back an inch. Pull the valve a little bit away from the olive, but leave on pipe. A few turns of ptfe very tight over the olive, winding it in the same direction as the nut will turn to tighten. Screw the nut back on, but gently and certainly not too hard. Use gas tape if you have it.
Best way is of course to remove the existing olive, make sure pipe is not marked and clean up until shiny and fit a new olive with a bit of jointing compound on the pipe before your slip the olive on, and then a bit on top

 

[gas_man_gaz]

ya sure its not coming from the gland nut and running down on to the fittings?