DuraVent 5" Diameter Type B Gas Vent Pipe - 6" Length: This unit necessitates a venting pipe with a 5" inner diameter. DuraType Vent's B chimney pipe is compatible with Category I natural gas and propane-fueled appliances such as furnaces, water heaters, boilers, and fireplaces. It has a sturdy double layer construction with an inner liner of 0.012" aluminum and an outside wall of 0.018" steel. It has a 5" inner diameter. This system's components connect using a secure twist-lock connection, and the complete system only requires a 1" clearance from combustibles. The part is UL and ULC listed and comes with a 25-year guarantee.

6 Inch length Efficiently vents Category I natural gas and propane-fueled appliances Resilient dual-layer construction 5" openings .012" aluminum inner liner and .018" galvanized steel outer wall Secure twist-lock connections Requires only 1" clearance to combustibles 25-year warranty UL and ULC Listed