For through-ceiling installations, use a wall firestop spacer. Designed to work with DuraVent Type B Gas Vent Pipes. A 25-year warranty is included. Use with DuraVent Type B Vent Pipes with a 4" diameter. Dimensions: 8 5/8" x 8 5/8". This unit necessitates a venting pipe with a 4" inner diameter. Protecting one's home from fire damage is a key consideration for most homeowners. A firestop is essential when vent tubes are installed through flammable materials to prevent chimney fires from rapidly spreading throughout the house. This ceiling firestop spacer fits DuraVent Type B gas vent pipes with a 4" diameter. Installing this ceiling firestop is a minor step to secure your house for years to come, thanks to a 25-year warranty.

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 4" diameter Dimensions: 8 5/8" x 8 5/8"