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Metal-Fab 3MIX6 - Metal Fab B-Vent Increaser 3" X 6"

Item: 3MIX6

This product is no longer available for purchase.

Comparable Products


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. Some of those features are:
  • Elimination of sharp edges by hemming the flue and casing.
  • Assembly & disassembly, without tools, using positive twist lock.
  • 360 degree rotation of small diameter fittings using swivel tees, wyes, and elbows.
  • Space savings inside standard stud walls using oval pipe.
UL listed to mate with other specifically identified and listed round gas vent, 3"-6" diameters, allowing you to add a new run of Metal-Fab B-vent to an existing run of common vent. Metal-Fab 3"-6" diameter B-vent pipe is now standard with our new Surelock® B-Vent Locking System . The patented locking system provides a secure lock with just the push of a tab, and can be easily disassembled by pulling the tab back out. Commercial Vent or "BIG Vent" is available in round sizes of 14" - 30". Big Vent sections (in 16" - 30" diameters) are joined together using Metal-Fab's quick connect locking system.


NameMetal-Fab 3MIX6 - Metal Fab B-Vent Increaser 3" X 6"
Gemaire Item Number3MIX6
Manufacturer Product Number3MIX6
SKU - PIM Number1383140743052
ERP Number170332
Unit of MeasureEA
Weight0.9 Pounds (Lb)
Length14.3 Inches (In)
Width9.5 Inches (In)
Height12.8 Inches (In)
Country of OriginUSA
Diameter3" - 6"
CompositionOuter wall is constructed of galvanized steel .018" thinck G90 Steel for sizes 3" to 14" diameter and .024" think G90 for sizes 16" to 30" diameter. The inner wall is constructed of aluminum alloy .012" think for sizes 3" to 8" diameter and .018" thick f
Connection Size3" to 6"
GaugeOuter Wall - 26ga, Inner Wall - 30ga
UL ListedYes
GEM - Case Quantity


Parts List