DuraVent 4" Diameter Type B Gas Vent Pipe - 6" Length: This unit necessitates a venting pipe with a 4" inner diameter. Looking for a versatile and long-lasting vent that can be used with either gas or propane to power your home? This model includes a vent designed specifically for category I natural gas and propane appliances. This item is built with a durable dual-layer design. Twist-lock connections are secured by a .012" aluminum inner liner and a .018" galvanized steel outer wall, which requires only 1" of clearance from combustibles. Allow DuraVent to take care of everything when you buy their dependable installation pipe.

6 Inch length Efficiently vents Category I natural gas and propane-fueled appliances Resilient dual-layer construction 4" 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