![vent - How should I seal a flexible flue liner passing through large clay thimble? - Home Improvement Stack Exchange vent - How should I seal a flexible flue liner passing through large clay thimble? - Home Improvement Stack Exchange](https://i.stack.imgur.com/Bxshk.jpg)
vent - How should I seal a flexible flue liner passing through large clay thimble? - Home Improvement Stack Exchange
![vent - How should I seal a flexible flue liner passing through large clay thimble? - Home Improvement Stack Exchange vent - How should I seal a flexible flue liner passing through large clay thimble? - Home Improvement Stack Exchange](https://i.stack.imgur.com/Cd1si.jpg)
vent - How should I seal a flexible flue liner passing through large clay thimble? - Home Improvement Stack Exchange
![Furnace or Boiler Liners - Liners and External Vents - Chimney Services | Windisch Chimney Services LLC | Buffalo Furnace or Boiler Liners - Liners and External Vents - Chimney Services | Windisch Chimney Services LLC | Buffalo](https://img77.uenicdn.com/image/upload/v1655156068/business/865ac750-d3c1-40d6-b905-c4166ba24529.jpg)
Furnace or Boiler Liners - Liners and External Vents - Chimney Services | Windisch Chimney Services LLC | Buffalo
![I had a new oil furnace installed a few weeks ago. Is there a problem with this flue pipe? I've read you shouldn't reduce them : r/HVAC I had a new oil furnace installed a few weeks ago. Is there a problem with this flue pipe? I've read you shouldn't reduce them : r/HVAC](https://i.redd.it/0gzm4qddmp341.jpg)