How do I conduit/ lag plastic pipes buried in concrete?

[RRRRRR]

Hi- I'm burying 15mm barrier mains water pipe, and CH barrier in a kitchen concrete slab before Jabfloor insulating it. (Basically I think it will be easier than chanelling out the underside of the Jabfloor for the pipes).

Is something like JG 15mm conduit OK for this? Or is 22mm easier/ better?

And can I/should I use foam pipe insulation in the concrete for the CH pipes instead of conduit?

Any help gratefully received. Thanks!

 

[gas4you]

Run the plastic pipe within a flexible plastic liner.

Hep make it.

Search on their website for info.

 

[RRRRRR]

-And do the CH pipes need insulation? How do I do this if conduit already on pipe? Thanks.