In Switzerland we use PE-h for our drainage pipes, as well as PE-x for drink water both would be a good alternative doesn't burn on its own! I used it for some of my cable routing . In my studio I used a pipeing referded to here as Metalverbundrohr it's has a sandwiched layer of aluminum between 2 layers of Polyethylene.
Cable Pass-throughs?
Originally posted at johnlsayers.com, topic 2020.