Have decided to fit TRV's after replacing a clogged 3 port has resulted in the rads getting blazing hot.
All the rads are fed by 10mm which disappears into the walls, here is an example:
Looking at Screwfix it seems there are 3 options, a straight replacement using the existing olive & nut:
Drayton version of the above with snapping olive:
Opinions on which to go with? I want to avoid as much disruption & leaks as possible.
I'll be doing these as an ongoing project, will rubber bungs in the F&E tank be OK to avoid draining down each time?