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Metal-Fab 3 Inch to 6 Inch Type B Round Chimney Pipe Increaser

List Price: $38.99
Sale Price: $30.95
You Save: $8.04 (21%)
In Stock.
* Usually Ships within 3-5 Business Days.
Part of Metal-Fab's versatile Type B line, this Metal-Fab 3 Inch to 6 Inch Type B Chimney Pipe Increaser is exactly what you need if you want to increase your round vent diameter from three to six inches.


  • Allows connection of 3" and 6" pipe
  • .018" galvanized steel outer wall and .012" aluminum alloy inner wall
  • Double-wall design allows a 1" clearance to combustibles
  • 1/4" insulating air space
  • For use with Metal-Fab Type B Round Chimney Pipe
  • SureLock locking system creates secure connections without tools
  • Hemmed flue and casing eliminate sharp edges
  • Compatible with other brands of UL Listed round gas vent pipe (see list below)
  • Listed to UL 441
  • Limited one-year warranty
  • Specifications:
    • Small End: 3" Dia.
    • Large End: 6" Dia.
    • Height: 6.5"
Compatible with the following brands of Type B gas vent pipe :
  • General Products Co. - Airjet
  • American Metal Products Co. - Amerivent
  • Hart & Cooley - Metlvent
  • Household Manufacturing Inc. - Metalbestos and Airmate
  • Mitchell Metal Products Inc. - Mitchvent
  • Selkirk Metalbestos - Metalbestos
  • Simpson Dura-Vent Inc. - DuraVent
  • ECCO Heating Products - ECCO Manufacturing
Manufacturer: Metal-Fab Type B
Part Number: 3MIX6
eFireplaceStore Item Number: MFB-3MIX6

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Metal-Fab 3 Inch to 6 Inch Type B Round Chimney Pipe Increaser
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