METAL-FAB Round Gas Vent Pipe, Type B Double Wall, Series M, 5 inch diameter, 5 feet Length, 1/4 inch Thickness, Aluminum
Metal-Fab's round and oval Type-B vent is listed by Underwriters Laboratories for use with approved category 1 gas furnaces, heaters, and boilers. A category 1 appliance operates with a non-positive vent static pressure. The double wall design of B-vent enables the product to be used inch homes and commercial buildings at close clearance to combustible. Metal-Fab's B-vent design incorporates features that make installation quick, easy, and safe.