Grant Orange System Flexible Flue Kit 6M (100mm)
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Grant Orange System Flexible Flue Kit 6M (100mm)
(Approx. 3-5 working days)


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This 6-metre flexible flue kit is used when connecting a Grant oil boiler to an existing masonry chimney, providing a smooth, lined passage for the safe removal of combustion gases. It belongs to the Orange System range and is suitable for boilers within the 12–46kW output band that require a conventional (open-flue) chimney arrangement rather than a balanced system.
The flexible liner is designed to be lowered through the chimney and coupled to the boiler using dedicated adaptors supplied within the kit. This method helps restore performance in older flues by reducing turbulence and improving the draft conditions needed for stable boiler operation. The 100mm diameter is suited to smaller and medium output models commonly installed in renovations or upgrades.
As part of a complete Orange System installation, this kit connects with terminals, adaptors and plates found within the Oil Boiler Flues category. Planning should follow Grant’s guidance for chimney height, ventilation requirements under BS 5410, and clearances relating to existing chimney structure and access.
Kit Components
- 6-metre smooth-bore flexible liner
- Top plate and top clamp
- Chimney cowl / terminal
- Appliance connector / adaptor
- Support straps and fixings
- 6-metre flexible liner for existing chimneys
- Suitable for 100mm conventional flue installations
- Compatible with 12–46kW Grant oil boilers
- Smooth internal bore improves gas flow
- Includes terminal, adaptors and fixing components
| Brand | Grant |
|---|---|
| Applicable Standards | CE Approved |
| Connection Type | Flexible liner with adaptors |
| Diameter | 100 mm |
| Length | 6 m |
| Model Name / No | GFKIT6/100 |
| Weight | 6 kg |
| Sold Per | Pack |
| Suitable For | Grant oil boilers 12–46kW |
- Delivery cost will be calculated at checkout once delivery address has been confirmed
- Delivery lead times are an estimate only
- Delivery drivers will always prioritise safety over convenience when offloading materials
- Bagged products such as cement and plaster cannot be returned once opened
- Jumbo bags cannot be returned once delivered
- All other goods may be returned within 3 months with a proof of purchase provided
- Chargeable pallets may be returned for a full refund
- All online pricing is specific to Northern Ireland only. Pricing for our Isle of Man branch may vary.
This 6-metre flexible flue kit is used when connecting a Grant oil boiler to an existing masonry chimney, providing a smooth, lined passage for the safe removal of combustion gases. It belongs to the Orange System range and is suitable for boilers within the 12–46kW output band that require a conventional (open-flue) chimney arrangement rather than a balanced system.
The flexible liner is designed to be lowered through the chimney and coupled to the boiler using dedicated adaptors supplied within the kit. This method helps restore performance in older flues by reducing turbulence and improving the draft conditions needed for stable boiler operation. The 100mm diameter is suited to smaller and medium output models commonly installed in renovations or upgrades.
As part of a complete Orange System installation, this kit connects with terminals, adaptors and plates found within the Oil Boiler Flues category. Planning should follow Grant’s guidance for chimney height, ventilation requirements under BS 5410, and clearances relating to existing chimney structure and access.
Kit Components
- 6-metre smooth-bore flexible liner
- Top plate and top clamp
- Chimney cowl / terminal
- Appliance connector / adaptor
- Support straps and fixings
- 6-metre flexible liner for existing chimneys
- Suitable for 100mm conventional flue installations
- Compatible with 12–46kW Grant oil boilers
- Smooth internal bore improves gas flow
- Includes terminal, adaptors and fixing components
| Brand | Grant |
|---|---|
| Applicable Standards | CE Approved |
| Connection Type | Flexible liner with adaptors |
| Diameter | 100 mm |
| Length | 6 m |
| Model Name / No | GFKIT6/100 |
| Weight | 6 kg |
| Sold Per | Pack |
| Suitable For | Grant oil boilers 12–46kW |
- Delivery cost will be calculated at checkout once delivery address has been confirmed
- Delivery lead times are an estimate only
- Delivery drivers will always prioritise safety over convenience when offloading materials
- Bagged products such as cement and plaster cannot be returned once opened
- Jumbo bags cannot be returned once delivered
- All other goods may be returned within 3 months with a proof of purchase provided
- Chargeable pallets may be returned for a full refund
- All online pricing is specific to Northern Ireland only. Pricing for our Isle of Man branch may vary.


