Fitting TP-Link KASA Smart TRV to radiator.

[Luetchy]

I have been trying to install some newly purchased Smart TRV. But I can't seem to work out which adapter is the correct on. I had no issues removing the current TRV.

When removed it looks like this:

I have the adapters listed in the instructions:

If anyone could help me either a) work out which adapter I should be using (I thought RA) or b) tell me the type of valve and I can go from there.

 

[Luetchy]

I found an older thread and it is Danfoss Ras C2, it looks like they aren't compatible. Should've done my research before hand.

 

[Luetchy]

Final update. It turns out the RA adapter did work. It need to be completely flush with valve. The adapter was a bit tight, but with a tool (penknife) I managed to get it to attach so there was no space at the bottom. The TRVs are working as expected. Hope this helps someone in the future.

 

[DP]

I will NEVER in a lifetime understand the reason for PTFE application as in above radiator. What purpose does the PTFE serve applying it like this