DuraVent Type B Gas Vent Square Ceiling Firestop Spacer - For Vent Pipes with a 6" Diameter - 6GVFS: This unit necessitates a venting pipe with a 6" inner diameter. Any homeowner installing a venting system for a gas fireplace should prioritize fire safety. A firestop is required when venting an appliance via combustible materials to safeguard the sensitive area where the pipeline penetrates the ceiling. DuraVent Type B vent pipes with a 6" diameter are compatible with this firestop. With a 25-year warranty, you can rest assured that this firestop will keep your home safe from fire. Install this DuraVent firestop with your gas fireplace venting system to protect your home.

Wall firestop spacer for through-ceiling installations For use with Dura-Vent Type B Gas Vent pipes 25-year warranty For Dura-Vent Type B Vent Pipes with a 6" diameter Dimensions: 10 5/8" x 10 5/8"