UFH - Supply and Return pipes...

[Mulberry View]

I have a UFH design, done by the company who'll be doing the screeding. They are able to supply quality components without the mark-up the likes of Continal et al enjoy.

 

But what of the Supply and Return pipes for the manifolds? We haven't bottomed out an ASHP design yet and ideally would prefer to kick this can a little further down the road if possible. Is it normal for these pipes to be placed in the screed to be considered later?

 

There is a manifold in the Utility Room, very close to the ASHP (no need for buried pipes?), plus one in the Kitchen and a possible third one for the first floor (I can't imagine that needs considering in the ground floor screed).

 

[Nickfromwales]

Why 2x manifolds? 
 

Just done 16 ports here, same manifold location, so doubt you need to spend out on the second setup.  

[Nickfromwales]

Sorry, 28mm pipes to the manifolds, which can be set into the top of the insulation.