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904L Mi-FLEX 125mm x 1m CUT LENGTH

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Our 904L Mi-FLEX 125mm x 1m flexible flue liner is your ultimate solution for relining masonry chimneys. Built with 904L grade stainless steel, this product offers tremendous durability and comes with a lifetime manufacturer’s warranty when used with Screw-FIX accessories.

£31.99 incl VAT

  •   Description  
  •   Product Details  

The 904L Mi-FLEX 125mm x 1m flexible flue liner by National Flues combines durability and versatility, making it perfect for relining masonry chimneys. Crafted from high-grade 904L stainless steel, this double-skinned flue liner boasts a smooth inner surface and a convoluted outer skin, each 0.105mm thick, ensuring both robustness and flexibility. Its unique quattrolock seam design provides an airtight seal. Suitable for a wide range of fuels including gas, oil, coal, coke, and approved smokeless fuels, this liner meets stringent HETAS and CE standards. Installation is straightforward, but must always begin from the chimney's top, and thorough cleaning and inspection are recommended for optimal performance.

  • SKU: 36Z-125-1
  • Item: 904L Mi-FLEX 125mm x 1m CUT LENGTH 125mm (5 inch)
  • Designation:: BS EN 1856-2 T200 P2 W Vm L70011 O
  • Inner Material:: 904L - 0.105mm thick
  • Outer Material:: 904L - 0.105mm thick
  • Fuels:: Smokeless
  • Approvals:: HETAS
  • Manufacturer:: Mi-Flues Ltd
  • Manufacture:: Single Strip
  • Seam:: Omega-Lock
  • Warranty:: Lifetime

What is it for?

The 904L Mi-FLEX 125mm x 1m flue liner is designed for relining masonry chimneys to improve safety and efficiency when burning various fuels.

Brand Summary

National Flues is a leading supplier of high-quality fireplaces and flues across the UK, renowned for competitive pricing, reliable delivery, and extensive support for both retail and trade customers.

National Flues Verdict

The 904L Mi-FLEX 125mm x 1m Flue Liner is a top-tier choice for both retail and trade customers. It's rare to find such high quality at a competitive price, coupled with our reliable nationwide delivery.

Our Rating
9.7/10

FAQs

The flue liner is made from high-quality 904L grade stainless steel with a smooth inner surface and a convoluted outer skin, each 0.105mm thick.

The 904L Mi-FLEX flue liner is suitable for burning gas, oil, coal, coke, cured dry logs, cured dry peat, and approved smokeless fuels.

Installation must always begin from the top of the chimney. Ensure the arrows on the liner point upwards, attach a Nose Cone with a string to pull it down the chimney, and have someone feed the liner from the top.

Yes, the 904L Mi-FLEX flue liner is approved and listed by HETAS and also has CE approval.

For optimum performance and safety, chimneys serving solid fuel appliances should be swept and maintained at least once a year.

Yes, but ensure your chimney pot is in good condition. If not using a suspended cowl, the pot should be removed from the stack during installation.

The quattrolock seal is a design feature where the steel strip is bent at 180 degrees and folded in four planes, creating a secure, airtight seam.