Pipe material for subslab OAK

[Pnwadam]

Thanks for the great info on this site. I am installing a wood stove in a central location, no access to outside wall. Ill be connecting an OAK but will need to run the inlet under the slab for about 12’. What pipe material should I use to ensure it will hold up to compaction pressure, as well as any backdraft potential. Is it ok to connect combustible pipe (pvc for ex) directly to the stove or is it sufficient to use dryer vent metal for a few feet? Thanks for your input!
adam

 

[cahaak]

Schedule 40 PVC pipe works well, but as you exit the slab, I would transition to something more like a metal dryer duct.