Technical Information


ULTRABlack has been tested and listed by Intertek Testing Services.

Listing #5965


ULTRABlack is designed to be used as a connector between a freestanding oil, wood or coal burning stove and a masonry or metal chimney. There are four primary advantages to ULTRABlack over single wall connector pipes:

  • It offers reduced clearance to combustible materials.
  • It is designed to last the lifetime of the stove and/or chimney system.
  • It offers reduced creosote formation.
  • It is certified for use with mobile home stoves.

Allowable Flue Gas Temperatures

Max Continuous 650°C (1200°F)

Brief Forced Firing 925°C (1700°F)

Tested To 1150°C (2100°F)

Clearance to Combustible Materials

ULTRABlack is certified for 6” clearance with the following exception. When ULTRABlack is used as the connector on a mobile home certified stove the clearance is determined by the installation instructions for the specific stove model being installed.


Flue: .016” stainless steel.

Casing: .019” satin coat steel. Satin coat is specifically designed to be painted.

Seam: Interior and exterior seams are seam welded.

Wall thickness: Approximately 3/8”

Paint: Forrest “Stove Bright” flat black