DuraVent DirectVent Pro 8×11 Wall Thimble: a sleeve for the pipe’s passage through your wall
The DuraVent DirectVent Pro 8×11 Wall Thimble is a sleeve that surrounds the vent pipe where it passes through the wall. It sits behind the horizontal cap outside and doubles as a firestop, closing the opening around the pipe. It fits walls from 5 1/2 to 10 1/2 inches thick, keeping a 3 inch air space above the pipe and 2 inches below and on each side. DirectVent Pro 8×11 is DuraVent’s large size pipe inside a pipe vent for big direct vent gas fireplaces, with an 8 inch exhaust pipe inside an 11 inch air pipe.
A wall run rises from the fireplace, turns at a 90 degree elbow, and passes through this sleeve to the cap. On vinyl siding, a standoff keeps the cap away from the wall. This is a listed vent, but the fireplace maker sets the run limits and clearances. The fireplace requirements and local code determine whether you need this sleeve or a wall firestop. The run should be inspected. Need the plate without the sleeve? See the DuraVent DirectVent Pro 8×11 Horizontal Wall Firestop plate. The DuraVent DirectVent Pro 8×11 Wall Thimble ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.

















































