On Mar 10, 12:30*pm, "Bob La Londe" wrote:

P.S. *I have seen other shops use PVC also, and they said they never had any
problems.

I had PVC air pipes for years until the warnings first appeared here.
Then I replaced them with iron near the wood stove and copper
elsewhere, just before the price skyrocketed. Some of the old PVC
pipes fragmented like glass when I tried bending them, others crinkled.