That's gotta be Danny Caywood you're talking about, as he is quite vocal - and I'd add as being biased - about liners.Trot said:Black Jaque said:Are you sure the builder was not accusing the use of a removable liner? I have received counsel to not make it a regular habit of removing a liner (or a nipple for that matter) as part of the regular cleaning routine. The reason being that repeated removal and replacement of these threaded objects can erode the threads.
I have never heard the claim that the mere presence of a liner was an inherent danger.
Nope, this builder is very vocal about the use of any vent liner as being dangerous.