Metal-Fab® round and oval type B vent is listed by Underwriters Laboratories for use with approved category I gas furnaces, heaters and boilers. A category I 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® B vent design incorporates features that make installation quick, easy and safe.
Metal-Fab® Gas Vent Pipe, M Series, 3 in Nominal, Twist-Lock Connection, 0.012 in, 0.018 in Gauge, Aluminum Alloy/Steel, Galvanized, 530 deg F, 48 in Length
| Connection Type | : | Twist-Lock |
| Finish | : | Galvanized |
| Gauge | : | 0.012 in, 0.018 in |
| Length | : | 48 in |
| Material | : | Aluminum Alloy/Steel |
| Nominal Size | : | 3 in |
| Series | : | M Series |
| Temperature Rating | : | 530 deg F |
- SureLock positive twist-lock
- Elimination of sharp edges by hemming the flue and casing
- Assembly and disassembly without tools, using positive twist-lock
- 360 deg rotation of small diameter fittings using swivel tees, wyes and elbows
- Space savings inside standard stud walls using oval pipe
- The vent shall be of the double wall, factory built type for use with approved category I appliance burning natural or LP gas, which produce flue gases exhausted at temperatures not exceeding 550 deg F
- The vent pipe shall incorporate a push tab locking system to prevent disassembly of vent during or after installation
- Vent shall be tested and listed for a min clearance to combustibles of 1 in for sizes 3 to 24 in Dia and 2 in for sizes 26 to 30 in Dia
- B vent shall be installed in accordance with the vent manufacturer's installation instructions, UL listing and state or local codes
- Type B vent shall be warranted by the manufacturer against defects in material and workmanship for a period of 1 Year from the date of the original installation
- Air insulated
- Vent overlaps 1-1/2 in when joined together
- B vent products shall be listed to UL 441 and carry the appropriate UL or cUL listing mark or label
- Aluminum flue with galvanized casing
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