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Metal-Fab 4 Inch to 7 Inch Type B Round Chimney Pipe Increaser

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$10.04 (25%)
In Stock.
* Usually Ships Same Business Day.
In Stock.
* Usually Ships Same Business Day.

Item Description
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Want to expand your 4" round chimney pipe to 7 inches? You can do it easily with Metal-Fab's chimney pipe increaser. This Type B chimney pipe increaser has a .018" galvanized steel outer wall with aluminum alloy inner wall, allowing a 1" clearance to combustibles. There are no sharp edges. And one of the things that makes this chimney pipe increaser so desireable is that Metal-Fab's design offers a secure locking system which means that no tools are required. The 4" end is also compatible with other brands of round gas vent pipe.
* Venting Requirements: This unit requires venting pipe with an inner diameter of 4 Inches. Please see the Venting tab on this page for venting pipe that must be used with this unit.
  • Allows connection of 4" and 7" pipe
  • .018" galvanized steel outer wall and aluminum alloy inner wall
  • Double-wall design allows a 1" clearance to combustibles
  • For use with Metal-Fab Type B Round Chimney Pipe
  • Secure locking system requires no tools
  • Hemmed flue and casing eliminate sharp edges
  • 4" end is 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: 4" Dia.
    • Large End: 7" Dia.
    • Height: 8.5"
3" to 6" pipe sizes are 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
Part Number: 4MIX7
Elite Deals Item Number: MFB-4MIX7
UPC: 622417101035

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Product Reviews
Metal-Fab 4 Inch to 7 Inch Type B Round Chimney Pipe Increaser
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