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| Diameter | : | 4 in |
| Domestic/Import | : | Domestic |
| Length | : | 3 ft |
| Material | : | Aluminum |
| Series | : | MO Series |
| Thickness | : | 2-1/2 in |
| Type | : | Type B Double Wall Oval |
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 combustible. Metal-Fab's B-vent design incorporates features that make installation quick, easy, and safe.
METAL-FAB® Gas Vent Pipe, Type B Double Wall Oval, Series: MO Series, 4 in Dia, 3 ft Length, 2-1/2 in Thickness, Aluminum, Domestic
- Elimination of sharp edges by hemming the flue and casing
- Assembly and disassembly, without tools, using positive twist-lock
- 360 deg rotation of small dia fittings using swivel tees, wyes, and elbows
- Space savings inside standard stud walls using oval pipe
- The vent shall be constructed of an outer wall of galvanized steel 0.018 in THK G-90 for sizes 3 to 14 in Dia and 0.024 in THK G-90 for sizes 16 to 30 in Dia
- The inner wall shall be constructed of aluminum alloy 0.012 in THK for sizes 3 to 8 in Dia and 0.018 in THK for sizes 10 to 30 in Dia