DuraVent Type B Gas Vent Storm Collar - For Vent Pipes with a 5" Diameter - 5GVSC: This unit necessitates a venting pipe with a 5" inner diameter. The correct flashing for your chimney ventilation system can provide excellent weather protection from adverse weather, but you must also have the right seal. This is where DuraVent's Type-B gas vent Storm collar comes in. This storm collar is designed to form a weather-resistant seal between your vent piping and flashing and is compatible with Type-B gas vent pipes with a diameter of 5". This storm collar is made of robust aluminum and provides 1" of clearance to combustibles in single and multi-family dwellings. It creates an airtight waterproof seal for the finest moisture defense available.

Creates weather-resistant seal between vent piping and flashing For use with 5" Dura-Vent Type B Gas Vent pipes 25-year warranty