Is this insulation necessary? Is it a hazard? Should it be removed ?

Frankfog2

I’ve looked at many photos and posts on this forum and never saw insulation on the pipe that heads up to the mains. Looks like fiber glass. Is it safe? Should i remove it?

Mad Dog_2

The vertical white insulation? Looks like Fiberglass. Get us a close up up the ends. MD

dabrakeman

That is fiberglass insulation. Won't hurt anything. Just leave it.

mattmia2

I've never thought having the paper jacket that close to the vent was a great idea but it happens a lot.