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Help required for replacing union valves.

Discuss Help required for replacing union valves. in the UK Plumbing Forum | Plumbing Advice area at PlumbersForums.net

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Mitch1612

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Hello,
New here.
I have some older type single radiators in my home, that I want to keep.
The are supplied by 15mm copper pipe, into the valve, that has a 3/4 union type fitting.
I want to replace these fittings with TRV's and am having difficulties finding a direct replacement.
My floors are concrete, so I don't want to replace the rads with 15mm compression valves, as I believe I would need to alter the pipework.
Any of you guys have ideas?

Thanks in advance.
PS, I'm not a plumber!!!!!!!!!!!!!
 
You won’t get any 3/4 union trvs so will need to adjust the pipework
 
Could you (stupid but it may work) put a straight TRV onto the pipework feeding the radiator without removing the existing valve? Might be a possible workaround if you can get the TRV into a position that is useable and don't mind it looking slightly unconventional (what WILL the neighbours think?!).
 

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