Discuss Which TRV in the DIY Plumbing Forum area at PlumbersForums.net

Am edging towards the Pegler Terrier 3 which I can get for £14 from Toolstation.
Morning,

I’m not sure if you’ve ordered yet, but Wickes have got some valves at good prices, quite a saving on 10 valves:



 
Have plumped for the Pegler Terrier 3 valves. They look as if a bit of engineering has gone into them. Just an aside question they have self sealing versions with an O ring.
When would one use one of these as opposed to the normal PTFE and screw it in tight approach?
 
Depends if it goes into the rad and tightens up before it bottoms out
 
Sorry not fully understanding that reply. As it has an O ring of course one just nips it up enough to slightly compress the O ring so how can it bottom out?
Sorry if I am missing the obvious.
 
https://www.NoLinkingToThis/p/pegler-terrier-3-white-chrome-angled-trv-lockshield-15mm-x/2052v

? Can’t see any oring
 
I have a habit of confusing myself and others here is a link to a Pegler valve with the O ring.

 

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