SFL Twin Wall Flue Individual Components

Sflue twin wall flue pipe is manufactured to a very high standard in the UK and is designed to meet the requirements of multifuel appliances. Sflue has the end user in mind as it utilises an eight-barb quick lock jointing system to secure each joint and is the preferred product of installers. The components are secured by locating the barbs with a twist of each section and a locking band must then be used to secure the fixing. A 25mm layer of high performance mineral wool is injected between the inner and outer skins offering exceptional thermal performance at very competitive prices, and all from a UK based company.

All components required to complete both internal (passing through the roof) and external (passing through an outside wall) SFL Twin Wall systems are contained within the dropdown menu.

Increaser Single to Twin will increase the internal diameter of a flue system by one inch. If you are not increasing the diameter, please select Single Wall to Twin Wall Adapter only.

Please note, to allow the full rotation of the part, this item does not feature the barbs at one end but is instead secured in place using the locking band provided.

Please note, all components within this multi-listing are compatible for use with Twin Wall insulated flue systems only. Twin Wall insulated flue pipes feature a 2" greater outer diameter than inner diameter and therefore, components designed to secure around your Twin Wall flue (such as Brackets, Collars and Plates) will measure 2" greater than the diameter selected (for example - 5" Storm Collars measure 7" and 6" Wall Brackets measure 8").

  • Brand: SFL Sflue
  • Colour: Stainless
  • Warranty: 15 years
  • Approvals: CE & HETAS
  • Designation: EN:1856-1 T450 N1 D VM L50040 G(50)
  • Thickness of steel: 0.40mm
  • Insulation: 25mm High Performance Mineral Wool (Where applicable)
  • Grade of Inner Wall Steel: 316
  • Grade of Outer Wall Steel: 304
  • Distance to combustibles: 50mm
  • Fuels: All Solid Fuels & Oil
  • Temperature resistance: 450°C
  • Locking band included: Where applicable
  • Compatible with other brands: Selkirk & SFL SFlue only
  • Connection: 8-Barb Twist-Lock
  • Unsupported Height: 1.5m
  • Despatched from stock

When selecting components to secure around your twin wall flue (such as Brackets, Storm Collars and Finishing Plates), please select the same diameter as the twin wall itself i.e. 5” Twin Wall Pipe requires 5” Twin Wall Brackets.

This product can be returned to us within 30 days of purchase for a refund. You will need to obtain a returns number from us either directly or via an eBay Return Request and return the item in an unused, re-sellable condition for us to issue a refund.

A minority of locations unfortunately incur extra carriage charges due to location of courier hubs. This can affect (but not limited to) addresses in Scotland, Northern Ireland, North West/South West England and Islands. Should your order be affected, we shall contact you the following business day. This is independent of the eBay carriage calculator.