Metal-Fab 3MIN4

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Metal-Fab 3MIN4



3MIN4 B-vent Flue Increaser 3"x4"

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3MIN4 B-vent Increaser 3"x4"


Installation Instructions

Metal-Fab round B-Vent has been evaluated and listed by Under writers Laboratories, Inc., to mate with other specifically identified and UL listed round gas vent, in 3" through 6" diameters. Metal-Fab's approval covers connections at both the male (outlet) end, and the female (inlet) end to the following B-Vent products:

  • General Products Co., Inc. (Airjet)
  • American Metal Products Co. (Amerivent)
  • Hart & Cooley (Metlvent)
  • Household Manufacturing Inc. (Metalbestos & Airmate)
  • Mitchell Metal Products Inc. (Mitchvent)
  • Selkirk Metalbestos (Metalbestos)
  • Simpson Dura-Vent Inc. (Duravent)
  • ECCO Heating Products (ECCO Manufacturing)

At the male (outlet) end of compatible gas vent, add an adapter or adjustable length (M6A,
M12A, or M18A) - then add sections of Metal-Fab pipe. At the female (inlet) end of
compatible vent simply insert the male end of Metal-Fab B-Vent into the compatible gas
vent and secure per instructions.

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