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SFLUE Extension Brackets Short SS

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  • SFLUE Extension Brackets Short SS
  • SFLUE Extension Brackets Short SS
£42.95 inc VAT

Free delivery when you spend over £150*


SFLUE Twin Wall

A quaility twin wall flue system designed and built in Britain to meet requirements for multi-fuel appliances operating under negative or non-condensing conditions. The fully welded construction, combined with a high performance insulating medium, provides the optimum level of performance for both DEFRA approved and the latest EcoDesign high-efficiency stoves, in addition to both modern and traditional appliances.


Twist-Lock Jointing System

Sflue utilises an eight-barb twist lock jointing system to secure each joint. The components are secured by engaging the barbs with a firm twist of each section, and then finished with a locking band. The joint design facilitates a maximum unsupported height above the last support of up to 1.5 metres. A locking band is provided with all female ended couplers.



Sflue is manufactured from a high grade 316L stainless steel liner and a 304 outer case. The unique joint design allows the inner liner to freely expand and contract throughout the system as the flue gas temperature varies, eliminating the need for additional expansion components.


Insulation Properties

The product utilises a high performance mineral wool, which is auger injected into a 25mm annulus between the inner and the outer. A mean insulation density of 250kg/m3 offers rapid stabilisation of draught and excellent thermal performance. The insulation properties achieve a 50mm distance to combustibles and a 2 hour fire rating.

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Dimensions / Specifications

Temperature Class:
T450 (Up to 450°C)
Pressure Class:
N1 (Negative to 40 Pa)
Condense Resistance:
D (Dry only)
Corrosion Class:
Vm (Rating declared by manufacturer)
Material Specification:
L50040 (316L 0.4mm thickness)
Soot fire Resistance:
G50 (Resistant, 50mm clearance to combustibles)
Inner Material Type:
316L stainless steel
Outer Material Type:
304 stainless steel
15 Years
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