Pex sizes variants 15 16 1/2"

[logic28]

I'm about to run water and heating pipes to what is going to be my new studio/garage building and trying to choose the type of pex for the job.
I would like to use blue and red for the cold and hot water but I have noticed that it only comes in 1/2" rather than 15mm.
Now, as I see pex and pex-al-pex in 15mm, 16mm and 1/2" sizes my question is simply . . . can I use 1/2" pex instead of 15mm pex?
Furthermore, is by any chance 16mm equal to 1/2" which is in fact 15.8mm ?

Many Thanks

Maz

 

[ShaunCorbs]

You got some links to the products ?

 

[logic28]

You got some links to the products ?

I think this is what they use in the USA, I've seen various videos, I like the product (and it is also cheaper) but it's 15.8mm (0.8 larger) even though many states it makes non difference in pex and also in copper, same fittings as 15mm. POSSIBLE ?
[automerge]1590615260[/automerge]

 

[ShaunCorbs]

If your planning on using that your going to need transition fittings

 

[logic28]

Ap15mm and 1/2" don't seem to create problems according to this:

View: https://youtu.be/i8jFJjMR-K0


True ? False ? maybe ?