Rock-Vent Insulated Tee and Tee Cap
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The Rock-Vent Insulated Tee and Tee Cap will be located at the base of the chimney in your installation. The Tee can be installed on the interior or the exterior of a structure.
The included tee cover is now easier to remove by means of a one nut driver connection; it's easy to remove, yet childproof. Install with a wall support or a tee support assembly.
The Standard Tee features a deep bottom reservoir, extending 8.75" below the snout, which means you do not need an extra section of pipe when using a tee support assembly to attach the tee cover. The tee snout length measure 3" in length. No more screws stripping out on the tee cover, making cleaning and inspection a breeze!
We offer two steel options for the Insulated Tee: 304L Stainless Steel Inner/430 Stainless Steel Outer or 316L Stainless Steel Inner/430 Stainless Steel Outer.
Measurement Chart:
Class A Tee

5” | 6” | 7” | 8” | |
A | 5” | 6” | 7” | 8” |
B | 7.5” | 8.5” | 9.5” | 10.5” |
C | 10.4” | 11.4” | 12.4” | 13.4” |
D | 7.5” | 8.5” | 9.5” | 10.5” |
E | 18.125” | 19.125” | 20.125” | 21.125” |
F | 7.125” | 7.125” | 7.125” | 7.125” |
*Due to many variables beyond our control, the installer should check actual parts for final dimensions.
Product Details:
The Rock-Vent Insulated Tee and Tee Cap will be located at the base of the chimney in your installation. The Tee can be installed on the interior or the exterior of a structure.
The included tee cover is now easier to remove by means of a one nut driver connection; it's easy to remove, yet childproof. Install with a wall support or a tee support assembly.
The Standard Tee features a deep bottom reservoir, extending 8.75" below the snout, which means you do not need an extra section of pipe when using a tee support assembly to attach the tee cover. The tee snout length measure 3" in length. No more screws stripping out on the tee cover, making cleaning and inspection a breeze!
We offer two steel options for the Insulated Tee: 304L Stainless Steel Inner/430 Stainless Steel Outer or 316L Stainless Steel Inner/430 Stainless Steel Outer.
Measurement Chart:
Class A Tee

5” | 6” | 7” | 8” | |
A | 5” | 6” | 7” | 8” |
B | 7.5” | 8.5” | 9.5” | 10.5” |
C | 10.4” | 11.4” | 12.4” | 13.4” |
D | 7.5” | 8.5” | 9.5” | 10.5” |
E | 18.125” | 19.125” | 20.125” | 21.125” |
F | 7.125” | 7.125” | 7.125” | 7.125” |
*Due to many variables beyond our control, the installer should check actual parts for final dimensions.
Help & Documents:
DIY Center
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From video tutorials to product walkthroughs, we have a variety of DIY resources just for you! Click the button below to view our entire library.

Our 316Ti flexible chimney liner and chimney liner components have passed the rigorous testing at the Underwriters Laboratories with best in class status and are UL Listed. So if you are looking for UL listed chimney liner sold directly to homeowners, then look no further than Rockford Chimney