Grant Vertical Flue Extension 450mm (Up to 26kW)
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Grant Vertical Flue Extension 450mm (Up to 26kW)
(Approx. 3-5 working days)


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A 450mm extension section used to increase the overall length of a Grant White System balanced flue run for internal high level or vertical installations on boilers up to 26kW. It is supplied as a fixed length component intended to be joined to other White System sections using the manufacturer’s locking method.
The extension is used when the standard kit length is not sufficient and extra reach is needed to achieve the required terminal position. It is designed for use only within the Grant White System flue components range and should not be mixed with Yellow, Orange, or other system parts.
Flue routing can be extended horizontally and vertically within the limits set by Grant for the White System, including a maximum total flue length of 10m, with allowances reduced when extra bends are added. Flue sections are not intended to be cut.
- Fixed 450mm extension length for White System flue runs
- Suitable for Grant boilers up to 26kW
- Designed for internal high level or vertical balanced flues
- Supports horizontal and vertical flue routing within limits
- Locking band supplied for secure jointing
| Brand | Grant |
|---|---|
| Energy Rating | Not Selected |
| Applicable Standards | CE Approved |
| Diameter | 150 mm |
| Includes | Locking Band, 450mm Extension |
| Length | 450 mm |
| Model Name / No | EXT K 09 450/90 |
| Sold Per | Item |
| Suitable For | Grant oil boilers up to 26kW |
| System Type | EZ-Fit White System |
| Flue Type | Balanced Flue |
- 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.
A 450mm extension section used to increase the overall length of a Grant White System balanced flue run for internal high level or vertical installations on boilers up to 26kW. It is supplied as a fixed length component intended to be joined to other White System sections using the manufacturer’s locking method.
The extension is used when the standard kit length is not sufficient and extra reach is needed to achieve the required terminal position. It is designed for use only within the Grant White System flue components range and should not be mixed with Yellow, Orange, or other system parts.
Flue routing can be extended horizontally and vertically within the limits set by Grant for the White System, including a maximum total flue length of 10m, with allowances reduced when extra bends are added. Flue sections are not intended to be cut.
- Fixed 450mm extension length for White System flue runs
- Suitable for Grant boilers up to 26kW
- Designed for internal high level or vertical balanced flues
- Supports horizontal and vertical flue routing within limits
- Locking band supplied for secure jointing
| Brand | Grant |
|---|---|
| Energy Rating | Not Selected |
| Applicable Standards | CE Approved |
| Diameter | 150 mm |
| Includes | Locking Band, 450mm Extension |
| Length | 450 mm |
| Model Name / No | EXT K 09 450/90 |
| Sold Per | Item |
| Suitable For | Grant oil boilers up to 26kW |
| System Type | EZ-Fit White System |
| Flue Type | Balanced Flue |
- 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.


