Doug , it’s standard full size poly type pipe the same issued in all hydronic heating and as I said there can be no leaks , as it’s s single very long pipe with no connectors Under the floor I suppose a service person could drill 4-5” through the floor into it. Same with electric grid, in fact I’ve heard more problems with failed / broken wires in electric grid as many of the used coaches I shopped for some years ago , the floor electric heat didn’t work . Those who I’ve talked to have it seem to love it , both types.
The nice thing on the hydronic is it doesn’t need 110 to work.