DuraVent DirectVent 4 in. D X 48 in. L Galvanized Steel Exhaust Vent Pipe

Designed for appliances tested and listed for direct vent and features a fully unitized twist-lock construction. Use of sealant is optional, unless specified by the appliance manufacturer. To calculate install length, subtract 1 1/2″ for each joint. No beads or hems, allowing for a beautiful, sleek finish that looks great in any interior. All DirectVent Pro black pipe lengths feature exterior laser-welded seams. Features a .020″ aluminum inner wall and .018″ galvanized outer wall Outer pipe brings combustion air to the appliance