METAL-FAB® - Double Wall, Adjustable Pipe, 4 in x 12 in

  • Item #: 4M12A
  • Manufacturer: 4M12A
  • Brand Name: METAL-FAB®
  • Min. Order Qty: 1
  • Qty. Interval: 1
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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.

Adjustable Round Gas Vent Pipe, Type B Double Wall, Series: M, 4 in ID Dia, 12 in Length, 1/4 in Thickness, Aluminum, Domestic

  • pdfData/Spec Sheet-1
  • pdfInstruction/Installation Sheet
  • pdfBrochure
  • 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 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 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
  • 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 one (1) year from the date of the original installation
  • Air insulation
  • Vent overlaps 1.5 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/galvanized steel casing