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. DuraVent Type B vent pipes with a 3" diameter are recommended. Dimensions: 7 5/8" x 7 5/8". A vent pipe with a 3" inner diameter is required for this unit. Passing your vent through a ceiling can be a dangerous operation that might result in an unintentional fire if not done correctly. You can pass your vent installation through a ceiling securely with this firestop spacer. With this spacer, you just need 1" of clearance. The twist lock design allows you to attach it to your fireplace vents quickly and effortlessly. This product has a lengthy guarantee and robust materials, making it a long-lasting addition to your home, and its wonderful design and usefulness can help make your home safer.

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 3" diameter Dimensions: 7 5/8" x 7 5/8"