DuraFlex SS Tee w/ Clamp Band and Removable Take-Off for 4" Chimney Liner - 4DFS-T: A 4" inner diameter vent pipe is required for this unit. The seemingly trivial details can sometimes make the difference between a seamless chimney installation and one that is troublesome. The DuraFlex SS Tee, for example, comes with a Clamp Band and a Removable Take-Off for a 4" Chimney Liner. You'll be astounded at how well it not only maintains the durability of your fireplace, but also how effective it is. Don't wait, because this could be the missing piece of the puzzle you've been looking for.

DuraFlex Tee with Clamp Band and Removable Take-Off for 4-in. pipe Comes with attached tee cover and an 8" removable snout Tee body is 10"