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Metal-Fab 4 x 36 (3') Type B Double Wall Round Gas Vent Pipe UL Listed with SureLock Technology (#4M3)
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 in homes and commercial buildings at close clearance to combustibles. Metal-Fab's B-vent design incorporates features that make installation quick, easy, and safe. Some of those features are Elimination of sharp edges by hemming the flue and casing; Assembly & disassembly, without tools, using positive twist lock; -- UL listed to mate with

Price is $73.00
Price: $72.97