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Leaking radiator

I

IE00

Joined
21 Jun 2014
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London
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United Kingdom
Hello we have a leaking radiator. It's a vertical radiator installed in our shower room. We've tightened the valve but it still leaks. Any ideas?
 

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Hard to tell, but appears to be either a pinhole, or the blanking nut requires ptfe/new rubber o-ring.
 
Some clearer photos here. So the radiator was installed end of March, so I'd be surprised if it was a pinhole leak, but on closer inspection it doesn't look like it's leaking from the nut.

If it was a pinhole leak, how would we fix?
 

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If it’s only that old, I’d say you have a claim under the warranty. Not much use in an attempt to fix, would have to be new really.
 

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