×

 

Gas FLEX - High-Quality Flue Liners & Accessories | National Flues

Gas FLEX offers a range of flexible flue liner and installation accessories designed for gas appliances. At National Flues, we provide a comprehensive selection of flue liners in sizes ranging from 80mm to 300mm. These products are suitable for gas and oil applications, ensuring your fireplace operates efficiently and safely. Gas FLEX products are known for their durability and ease of installation, making them a top choice for both homeowners and professionals in the industry.

 

MI-FlexMI-Flex
Chimney FlueChimney Flue
Connecting PipesConnecting Pipes
Fans Flashings CowlsFans Flashings Cowls
Installation PartsInstallation Parts
After Care PartsAfter Care Parts
StovesStoves
FireplacesFireplaces
80MM (3 INCH)
80MM (3 INCH)
100MM (4 INCH)
100MM (4 INCH)
125MM (5 INCH)
125MM (5 INCH)
150MM (6 INCH)
150MM (6 INCH)
175MM (7 INCH)
175MM (7 INCH)
200MM (8 INCH)
200MM (8 INCH)
250MM (10 INCH)
250MM (10 INCH)
300MM (12 INCH)
300MM (12 INCH)
Triplelock 80m Dia x 44m Z PACK (Liner ONLY)
SKU: 4Z-80-44

Triplelock 80m Dia x 44m Z PACK (Liner ONLY)

£453.49 incl VAT

125mm (5 inch) ILFE Flue Box Flue Box
SKU: 8-ILFE

125mm (5 inch) ILFE Flue Box Flue Box

£201.49 incl VAT

125mm (5 inch) Standard Flue Box Flue Box
SKU: 8-SFB

125mm (5 inch) Standard Flue Box Flue Box

£119.49 incl VAT

125mm (5 inch) Sheffield Pattern Flue Box
SKU: 8-SHEF

125mm (5 inch) Sheffield Pattern Flue Box

£104.99 incl VAT

125mm (5 inch) VISA Flue Gas Collector Flue Box
SKU: 8-VISA-SF

125mm (5 inch) VISA Flue Gas Collector Flue Box

£74.49 incl VAT

125mm (5 inch) VMF Flue Box SS Flue Box
SKU: 8-VMFS

125mm (5 inch) VMF Flue Box SS Flue Box

£78.49 incl VAT

Debris Collar with Nut and Bolt - Ø 175
SKU: 94-COLLAR-175

Debris Collar with Nut and Bolt - Ø 175

£23.99 incl VAT

Debris Collar with Nut and Bolt - Ø 200
SKU: 94-COLLAR-200

Debris Collar with Nut and Bolt - Ø 200

£25.99 incl VAT

Debris Collar with Jubilee Connector - Ø 125
SKU: 94-COLLAR-J-125

Debris Collar with Jubilee Connector - Ø 125

£13.99 incl VAT

Register Plate (F) - 900x495, no access hole - Ø 125 & 150
SKU: 94-REG-F

Register Plate (F) - 900x495, no access hole - Ø 125 & 150

£29.99 incl VAT

Register Plate (G) - 900x495, 2 access hole - Ø 125 & 150
SKU: 94-REG-G

Register Plate (G) - 900x495, 2 access hole - Ø 125 & 150

£54.49 incl VAT

Register Plate (H) - 900x600, no access holes
SKU: 94-REG-H

Register Plate (H) - 900x600, no access holes

£49.99 incl VAT

Triplelock - Cast Aluminium Terminal - Ø 125
SKU: 34-125-CT

Triplelock - Cast Aluminium Terminal - Ø 125

OUT OF STOCK

£51.49 incl VAT

Triplelock - Debris Plate (Spring Fix) - Ø 125
SKU: 34-125-DP

Triplelock - Debris Plate (Spring Fix) - Ø 125

OUT OF STOCK

£23.99 incl VAT

Triplelock - Plastic Nose Cone - Ø 125
SKU: 34-125-N

Triplelock - Plastic Nose Cone - Ø 125

OUT OF STOCK

£1.99 incl VAT

Triplelock - Flue Adaptor - Ø 200
SKU: 34-200-A

Triplelock - Flue Adaptor - Ø 200

OUT OF STOCK

£23.49 incl VAT

Triplelock - Adaptor to Single Wall - Ø 300
SKU: 34-300-A

Triplelock - Adaptor to Single Wall - Ø 300

OUT OF STOCK

£49.49 incl VAT

175mm (7 inch) Flue Liner 316L for Gas and Oil (316L Grade)
SKU: 4Z-180-1

175mm (7 inch) Flue Liner 316L for Gas and Oil (316L Grade)

OUT OF STOCK

£19.99 incl VAT

Triplelock 180mm Dia x 32m Z PACK (Liner ONLY)
SKU: 4Z-180-32

Triplelock 180mm Dia x 32m Z PACK (Liner ONLY)

OUT OF STOCK

£623.99 incl VAT

125mm (5 inch) Flue Gas Collector Flue Box
SKU: 8-FGC-SF

125mm (5 inch) Flue Gas Collector Flue Box

OUT OF STOCK

£81.99 incl VAT

Your Questions Answered

What sizes are available for Gas FLEX flue liners? -

Gas FLEX flue liners come in sizes ranging from 80mm (3 inch) to 300mm (12 inch), catering to a wide range of gas appliance installations.

Are Gas FLEX flue liners suitable for gas and oil applications? +

How do Gas FLEX flue liners enhance safety? +

Can homeowners install Gas FLEX flue liners themselves? +

Do Gas FLEX flue liners require regular maintenance? +

Are Gas FLEX flue liners compatible with all gas appliances? +

Can Gas FLEX flue liners improve the efficiency of a fireplace? +

Gas FLEX flue liners are crafted using high-grade materials to meet stringent safety standards. Our range includes liners in various diameters and lengths to suit different installation needs. Whether you're fitting a new fireplace or upgrading an existing system, Gas FLEX products offer a reliable solution. Each flue liner is engineered for optimal performance and longevity, providing a smooth passage for gases to vent out effectively. At National Flues, we not only offer top-quality products but also expert advice to help you select the right components for your project.
Why Buy These Products
Gas FLEX flue liners are essential components for venting gases from gas appliances safely. These liners create a secure passage for combustion byproducts to exit your home, reducing the risk of harmful emissions inside. By using Gas FLEX products, you can ensure proper ventilation for your fireplace or stove, enhancing both efficiency and safety. The flexible design of the liners allows for easier installation, making them ideal for various applications. Whether you're a homeowner or a professional installer, Gas FLEX flue liners provide a durable and reliable solution for your heating system.

Trusted By Trade Professionals

Our products and services are trusted by hundreds of professionals nationwide. We're committed to providing quality and reliability that meets the high standards of our customers.

Dedicated Support

Experience our unparalleled customer service and support. Our team is here to assist you every step of the way, ensuring your needs are met with expertise and care.