How to fix leaking trv

[Stesmith]

Hi,
Just moved in to a house and the radiator is leaking where the trv meets the feeding copper pipe.
I’ve drained the system and had the trv off, it looks like when they’ve changed them they’ve made a small cut on the pipe under the olive. I can only guess this is what’s causing the dripping.
Is there anyway of repairing this ? I don’t know if you can smear some sort of sealant on the cut? Or will I have to go under the chip board and put a new piece of pipe in?
Any help would be greatly appreciated. Thank you.

 

[New Gas Engineer]

Id replace the copper pipe from under the floorboards and refit the trv.

Unless you cut the pipe beneath the leak and solder a small piece of copper pipe in.
Wont look as good but it saves lifting the floorboards.

 

[steadyon]

1. Photograph would be useful.
2. If the cut isn't too deep you could try soldering the pipe, wiping off the excess solder with a pad of rag, then fitting a new olive.
3. If the olive has been crushed so hard onto the pipe that it has created an indented ring in it, you probably have no choice put to renew that end of the pipe.

 

[WC1]

Might try carefully wrapping 1 or 2 turns of ptfe tape over the olive, it's a bit of a knack but often fixes naughty olive / scored pipe.