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100mm (4 inch) Gas vent flue system SFL IL

SFL-IL-gas-vent-twin-wall-brochure

This gas vent system (SFL IL) is suitable for gas appliances, typically in domestic or small commercial installations, with draughthoods or with a flue gas temperature not exceeding 250°C and zero or negative pressure in the flue.

Components lock together positively to provide a strong rigid flue system and to ensure maximum ease of site assembly.

Features of this gas vent flue.

  • Twin wall construction - Aluminium and Zalutite
  • Air gap insulates and minimises condensation
  • Low external temperature reduces clearances required to combustibles
  • Atmospheric gas fired appliances only - Zero or Negative pressures in the flue
  • CE Approved EN 1856-1 T250 N1 D Vm L11030 O(50)

Read manufacturers documentation for detailed product information


Flexible liner to IL connector - 100mm (4inch) - IL gas flue
£13.58
inc VAT  £16.30
Connects to the top of a stainless steel flexible flue liner at the point where the liner exits an existing masonry, or similar chimney.
Adaptor to flexible flue liner - 100mm (4inch) - IL gas flue
£13.58
inc VAT  £16.30
Connects IL gas flue to flexible flue liner or fibre cement liner - lower end connects to IL flue
Draughthood or appliance connector - 100mm (4inch) - IL gas flu
£5.59
inc VAT  £6.71
Connects the system to an appliance spigot or where the system is connected to a Transfer or Adaptor block for a BS EN 1858 Flue Block system.
Increasing adpater 100 - 125 mm - 100mm (4inch) - IL gas flue
£19.80
inc VAT  £23.76
Increase the diameter of the flue
Connector - 76mm to 100mm IL - 100mm (4inch) - IL gas flue
£5.63
inc VAT  £6.76
Connects76mm appliance to 100mm IL flue
Disconnector section - 100mm (4inch) - IL gas flue
£41.74
inc VAT  £50.09
Provides maintenance access without disturbing the flue system.
Straight length 152mm - 100mm (4inch) - IL gas flue
£8.30
inc VAT  £9.96
Straight length - effective length is 38mm less
Straight length 305mm - 100mm (4inch) - IL gas flue
£12.58
inc VAT  £15.10
Straight length - effective length is 38mm less
Straight length 457mm - 100mm (4inch) - IL gas flue
£13.91
inc VAT  £16.69
Straight length - effective length is 38mm less
Straight length 914mm - 100mm (4inch) - IL gas flue
£24.89
inc VAT  £29.87
Straight length - effective length is 38mm less
Straight length 1524mm - 100mm (4inch) - IL gas flue
£35.93
inc VAT  £43.12
Straight length - effective length is 38mm less
Adjustable length 305mm - 100mm (4inch) - IL gas flue
£15.82
inc VAT  £18.98
Adjustable length - effective length 75-203mm
Adjustable length 457mm - 100mm (4inch) - IL gas flue
£21.45
inc VAT  £25.74
Adjustable length - effective length 75-356mm
90 degree Adjustable elbow - 100mm (4inch) - IL gas flue
£18.18
inc VAT  £21.82
Provides variable angles or offset to be made
90 degree equal tee - 100mm (4inch) - IL gas flue
£40.34
inc VAT  £48.41
90 Degree tee and cap
135 degree tee and cap - 100mm (4inch) - IL gas flue
£50.43
inc VAT  £60.52
135 Degree tee and cap
Tee cap - 100mm (4inch) - IL gas flue
£3.72
inc VAT  £4.46
Tee cap
Firestop spacer - 100mm (4inch) - IL gas flue
£3.86
inc VAT  £4.63
Used at floor or ceiling penetration (or in conjunction with the Support Plate) to maintain the required clearance to combustible materials.
Support plate - 100mm (4inch) - IL gas flue
£9.83
inc VAT  £11.80
Supports vents at floor penetrations with the supplied support flange
Wall band support - 100mm (4inch) - IL gas flue
£8.91
inc VAT  £10.69
Provide lateral support, use at intervals not exceeding 3m . If used externally, the galvanised component will require suitable weather protection.
Wall bracket adjustable - 100mm (4inch) - IL gas flue
£8.51
inc VAT  £10.21
Provides internal lateral bracing support. The strut can be cut to length to provide variation in wall clearance.
Guy wire bracket stainless steel - 100mm (4inch) - IL gas flue
£7.51
inc VAT  £9.01
Used to attach guy wires to the flue for external chimney support
Storm collar - 100mm (4inch) - IL gas flue
£7.51
inc VAT  £9.01
Storm collar
Gas vent terminal - 100mm (4inch) - IL gas flue
£20.73
inc VAT  £24.88
Terminates run of flue
Ridge tile adapter - 100mm (4inch) - IL gas flue
£21.18
inc VAT  £25.42
Designed to be used with any approved ridge tile vent.
Flashing EPDM Res 1
£24.99
inc VAT  £29.99
This flashing is used to provide a weatherproof seal where the flue passes through a tiled or slate roof.
Masterflash EPDM No 5
£32.46
inc VAT  £38.95
This flashing is suitable for sheet metal profiled roofs, flat roofs, boats and caravans. Comes with fixing kit.

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We pride ourselves on our customer service and aim to get our flexible flue liners and flue liner accessories to you quickly, which is why we keep products in stock.

We welcome trade and retail customers and deliver nationwide from our Nottingham base, East Midlands. Free delivery on most orders.