How to fit new radiator valves to 8mm pipe?

[Bandicoot20]

Hi all,

I have a problem that I'm hoping someone can help with.

Basically, I am trying to replace an old radiator&valves. The problem I'm having is that the old radiator valves are a completely different size to what I can find available.

I have 8mm microbore pipe that is currently connected to the old radiator valves.

I'm trying to fit the following TRV/valve;
http://www.screwfix.com/p/danfoss-ras-c-white-chrome-trv-lockshield-8-10mm-angled/53183

The old valve is currently connect as follows from the top - Valve>Olive>Nut

I understand that the Danfoss has the 8mm adapter which replaces an olive, but I just cannot work out how this securely fits to the 8mm pipe as the nut is much bigger than the old valve so I can't seem to get it to lock to the pipe when I tighten Valve>Adapter>Nut.

I've attached a picture to show the difference between the current (old) valve & the Danfoss.

How do I connect this to the 8mm pipe? Am I missing something, or have I bought the wrong valve in the first place?

Any help would be great.

Thanks,

Untitled

• Bandicoot20
• 22 Nov 2014
• 1

Untitled

• Bandicoot20
• 22 Nov 2014
• 1

 

[twgas]

You're almost there, keep tightening the nut and you'll hear/feel it 'break' and appear to loosen, a nip up and you're sorted.

 

[Bandicoot20]

You're almost there, keep tightening the nut and you'll hear/feel it 'break' and appear to loosen, a nip up and you're sorted.

Thanks for the reply. Just to check, once it 'breaks' should it then just be gently tightened a couple of turns? Or literally just a half turn?

Thanks,

 

[twgas]

I would say about a turn but when it feels tight, stop!