Tightened it as much as I can (I'm not exactly Arnie) and no luck.
Can an amateur replace this thing if I drain the radiator? Or at least jam some PTFE tape in? Or would that be ambitious?
Hi, I've got a minor leak in a radiator and I'd like to tighten/replace the leaking part but I don't know what it's called!
Pic: https://imgur.com/gallery/6sngypM
It's a bullet-shaped silver thing between thermostat control and rad, with a standard radiator key valve at the top. Probably ten...