Swapping radiator valve from manual to trv in bathroom.
This is more of a plumbing question than a Tado one specifically.
I’ve installed a bunch of Tado smart trvs throughout our house and have decided now to get one for the bathroom, only to find it’s a manual valve body which I understand will need to be swapped for a Tado friendly one.
I bought a 15mm drayton trv body online with the plan to install myself but the nut is a lot smaller than the one attached to the rad and I have a feeling that i need a larger trv body. I’ve read there are larger 22mm valves on some bathroom rads but looking online i can find any trv bodies that fit that size, only 15mm ones.
So a couple of questions:
Are my assumptions above correct? Maybe a 15mm trv body could work, maybe I dont even need one.
Do 22mm trv bodies exist or are they only manual, if that’s the case are there adapters/alternatives to getting the smart trv attached?
I’m happy to replace the valve to get the Tado trv on, but if it’s a case of replacing the whole radiator I might have use this new smart trv elsewhere... but Im thinking there must be a way.
I supplied some photos to show the rad and current valve
Im obviously no plumber, but happy to try a job like this before getting a pro in.