DirectVent Pro Wall Thimble (4” x 6 5⁄8”)

Installing a direct vent chimney through a combustible wall is simple with this Vent Pro vent pipe wall thimble by Dura-Vent. This chimney pipe thimble acts as a wall pass-through and firestop for direct vent piping for vent pipes with a 4 in. inner diameter. This thimble is  constructed from .020 in. aluminum inner wall, and a .018 in. galvanized steel outer wall. Refer to the appliance manufacturer's installation instructions for requirements.