What fitting do I need, please?

[MrSniff]

After much procrastination I have started the replacement of one of the  UFH manifolds with a shiny new Wunda one. Having removed the old manifold I can now see that it had a captive nut (probably the wrong term) to connect to the isolation valve - the Wunda manifold is just a fixed female fitting... since neither the isolation valve nor the manifold can be wound on to the other, I guess there must be a fitting I need but not knowing the name means a lot of searching has yielded nothing. Can anyone help me please?

 

(Based in Luxembourg I will then need to hope whatever the fitting is translates into German and is available here - not always guaranteed...)

 

Thanks for any help.

[dpmiller]

the fitting with the captive nut might unscrew. Look for a hex on the inside  or flats on the outside.

[MrSniff]

Thanks for the response.

Sadly it appears not - no hex or flats: it seem to be part of the casting.

[joe90]

I used Wunda and they sent me a wrong fitting fir mine, their service department were very helpful, give them a call, I am sure they will offer advice.

[Fly100]

if you are talking about the nut at the bottom of the 1st pic , im sure they are left hand thread if that helps.

[MrSniff]

Thanks both.

Seems to be a conventional thread. I will give Wunda a call and see what they say.

 

Thanks!