Lindemann B-Vent 5" Firestop in Silver

Use at every ceiling level where Square Firestop Support is not used. 3" 6" style shown in left photo. 7" 12" style shown in right photo. DuraVent s Type B Gas Vent system. Use with natural gas or liquid propane category I and draft hood equipped appliances, and appliances tested and listed to use Type B Gas Vent. Applications include: natural gas fireplaces, gas-fired furnaces, boilers, water heaters, and wall or space heating applications. A Firestop Spacer or Square Firestop Support are required for Type B Gas Vent Pipe when passing through a ceiling.