TRV for Radiator with 3/4" tail

13 Nov 2006
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United Kingdom
I am trying to source TRVs for my 20 year old CH System.
The radiators have tails that measure 22mm OS dia I understand they are described as 3/4" all the TRVs available seem to be 1/2" (15mm).
I also have a mixture of 15mm & 8mm pipe work.
Can anyone help please.
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you will need to replace the tails aswell. make sure you get yourself a radiator allen key and plenty of PTFE.
Yep change all the tails and get the correct size valves for the pipe ie 8 & 10mm or 15.
Thanks for the advice, but the tails supplied with the TRVs are 1/2" the thread into the rad's is 3/4" is there an adapter/reducer if so what is it called?.
Many thanks

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