Hi,
Please see image.
I have a bathroom radiator that I am struggling to work out how the TRV knob comes off so I can put a timer knob one on.
The front of the silver knob comes off and there seems to be a screw thread inside. I have done other radiators in the house but this one is different to those. On the others I haven't had to take the T part of - I just unscrew the knob thread underneath and then pop the new timer back in place.
Thanks for any assistance,
Stu