No, the pipes are the same, it just looks like TRVs were added and their connection to the rad is 1/2" where the connection to the lock shield is 3/4". I'm not changing the valves, yet, just the rads. Next time the heating system needs drained I'll look at updating the valves.
Also, Tado does not supply valves, just the sensing head.
The rads I took off have metal couplings, was hoping to just be able to get the right sizes of those (and then get someone more competent to replace the valves in future).
No, the pipes are the same, it just looks like TRVs were added and their connection to the rad is 1/2" where the connection to the lock shield is 3/4". I'm not changing the valves, yet, just the rads. Next time the heating system needs drained I'll look at updating the valves.
Also, Tado does not supply valves, just the sensing head.