Flue, Chimney and Renewable heat products
0333 999 7974


Sigma has been specifically designed as a connecting flue pipe to facilitate connection between an appliance and either an existing brick chimney or a prefabricated twin wall system. It is manufactured in the UK by SFL.

Suitable For

  • Solid fuel
  • Biomass
  • Internal use


  • Smooth, aesthetically pleasing joint without the need for locking bands
  • Stocked in 100mm matt black
  • Manufactured from 0.6mm 316L stainless steel
  • Specific connecting components for MCZ pellet stoves
  • 10 year conditional manufacturer’s guarantee


  • CE marked to BS EN 1856-2 with product designation T600 D V2 L50060 G(3 x Ø)
  • Tested at a temperature of 1000°C for 30 minutes as required under BS EN 1856-2

  Filename Format  
Sigma Brochure 2022 Sigma Brochure 2022 .PDF