DuraVent 4 to 5 Inch Oval B-Vent Pipe Increaser

DuraVent 4 to 5 Inch Oval B-Vent Pipe Increaser is the 2nd smallest of 8 sizes: Lower Vent Size 4 inches; Upper Vent Size 5 inches.

The DuraVent 4 to 5 Inch Oval B-Vent Pipe Increaser makes connecting your vent system a breeze. This handy piece lets you smoothly transition from a 4-inch oval vent to a 5-inch oval vent, simplifying your setup. It's designed to fit snugly within standard 2x4 and 2x6 stud walls, making installation straightforward. You'll appreciate the internal spacing beads that ensure a consistent air gap, which is pretty important for safety. Plus, it's built with a tough galvanized steel outer pipe and a smooth aluminum inner pipe for good performance. This vent increaser is a solid choice for Type B and BW installations, offering a reliable way to adjust your venting size.