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Metalbest 118825 Galvanized QC 18" Type B Gas Vent Adjustable Flashing for Flat to 6/12 Pitch Roof

Item #: BCI1070258
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Product Details for the Metalbest 118825 in Galvanized

18" Type B Gas Vent Adjustable Flashing for Flat to 6/12 Pitch Roof from the QC Collection

Flashings are used to seal the opening where the chimney penetrates the roof and to divert rain and snow down from the roof and away from the chimney system. It is important to choose flashing that matches the pitch of your roof. This flashing works for 0/12 to 6/12 pitch and has a 6" cone height. Note: To determine your roof pitch, measure the number of inches from the end of a level 12” ruler down to the roof. This is the rise for 12 inches of run. For example, a rise of 5 inches is a 5/12 pitch.

The QC series offers round gas vent pipe and fittings for large residential, industrial and commercial applications. Its adjustable length pipes eliminates the need for all cutting, fitting and special engineering. It features double wall pipe with built-in air space to reduce clearances and durable galvanied outer pipe with die formed ends.


  • Large residential, industrial and commercial applications
  • Materials: Galvanized steel outer and aluminum inner liner
  • Fuel: Gas
  • UL 441 listed
  • Minimum Safety Clearance to Combustibles:
    • 1" for diameters of 10" to 24"
    • 2" for diameters 26" to 48"
  • Warranty: Lifetime Limited Warranty
Our SKU: Metalbest 18QC-AF

This product is listed under the following manufacturer number(s):

*Denotes a finish or option that has been discontinued

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Metalbest 18QC-AF Technical Specs

Base Length 39
Base Width 34
Configuration Flashing
Fuel Type Gas
Height 6
Manufacturer Warranty Lifetime Limited
Material Aluminum, Galvanized Steel
Pipe Class Type B
Pipe Inside Diameter 18
Pipe Shape Round
Pitch 0/12 - 6/12
UL Listed Yes
Vent Construction Double Wall
Vent Pipe Size 18

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