Thanks to Buddy & the crew at Gem Plumbing for showing us how it's done.

The crew demonstrates feeding an InnoFlue Flexible liner through an existing b-vent. No glues, primers, or solvents.

UL1738 listed, and zero clearance to combustibles - InnoFlue Flex is your retrofit solution for existing b-vents and chimneys.

Gem Plumbing & Heating
https://askgem.com/