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Screw-FIX Adaptor to SW, 1mm - Ø 125

National Flues offers the premium Screw-FIX Adaptor to SW, 1mm - Ø 125, a vital solution for creating a seamless transitional joint between rigid single wall flue systems and MI-FLEX flexible liners. Engineered from robust 316L stainless steel, this adaptor ensures compliance with UK Building Regula... More...
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At a Glance

  • - 1mm thick 316L stainless steel for superior durability
  • - Designed specifically for a seamless transition between a rigid single wall flue system and MI-FLEX liner
  • - Complies with UK Building Regulations Document J and CE / HETAS standards
  • - Suitable for a range of fuel types including wood (<20% moisture), oil, gas, and smokeless coal
  • - Engineered to handle temperatures up to 600°C for high performance under extreme conditions
  • - Low stock availability underscores high reliability and demand
Now only £31.99
Including VAT Buy with confidence. If you find this cheaper within 48 hours of checkout, we'll refund the difference.

 

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Have Questions?
Phone: 01670 206999
Email: [email protected]

The Screw-FIX Adaptor to SW, 1mm - Ø 125 from National Flues is engineered to provide a reliable transitional joint connecting a rigid single wall flue system to MI-FLEX flexible liners of the same nominal diameter. Manufactured from high-quality 1mm 316L stainless steel, this adaptor ensures durability and robust performance in flue systems. The Screw-Fix Adaptor is designed specifically for use with MI-FLEX 316 and 904 flexible flue liners, completing your chimney system in compliance with UK Building Regulations Document J.

It is compatible with multi-fuel appliances operating at temperatures up to 600°C, and is suitable for wood (with moisture content <20%), smokeless coal, gas, and oil. Ensuring a gas-tight seal, this adaptor should be installed with fire cement, ceramic rope or tape, or high-temperature sealant. It is imperative that the flexible flue liner is entirely contained within a masonry chimney for safety and compliance.

Regular maintenance and sweeping of the chimney system by a competent person, ideally twice a year for solid fuel systems, is crucial to maintain optimal performance.

SKU: 25-125-MAE1

Technical Specifications
Material316L Stainless Steel
Nominal Wall Thickness1mm
Nominal Diameter125mm (u00d8 125)
Compatible LinersMI-FLEX 316 and 904
Fuel CompatibilityWood (<20% moisture), Oil, Gas, Smokeless Coal
Temperature RatingUp to 600u00b0C (T600)
Regulatory ComplianceUK Building Regulations Document J, CE / HETAS
Installation AccessoriesFire cement, ceramic rope/tape, or high-temperature sealant
Ensure the MI-FLEX flexible flue liner is completely contained within a masonry chimney before installation. Use fire cement, ceramic rope or tape, or a high-temperature sealant to achieve a gas-tight seal. Always follow manufacturer guidelines and consult with a competent installer. For safety and long-term performance, regular chimney maintenance is essential – have your system inspected and swept at least once a year, and twice a year for solid fuel systems. Do not attempt installation without the appropriate personal protective equipment and tools.

The Screw-Fix Adaptor is used to connect a rigid single wall flue system to a MI-FLEX flexible flue liner of the same diameter, ensuring a smooth and reliable transition.

Yes, the adaptor is suitable for wood (with moisture content <20%), smokeless coal, gas, and oil appliances.

Absolutely. The adaptor complies with the UK Building Regulations Document J, ensuring safe and legal installation within masonry chimneys.

The adaptor is designed to handle temperatures up to 600°C (T600 designation).

To ensure a gas-tight seal, you should use fire cement, ceramic rope or tape, or a high-temperature sealant when installing the adaptor.

It is recommended to have the chimney system swept and inspected at least once a year by a competent person, and twice a year for solid fuel systems.

No, the MI-FLEX flexible flue liner must be completely enclosed within a masonry chimney for safety and regulatory compliance.
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Thursday, April 3rd. If you need faster stove or fireplace delivery please give us a call. We can often reduce longer lead times if we pay the carrier £25 for express delivery. Visit our Shipping Information page for more information.

Warranty & Returns +

All our products come with warranties. Mi-Flex offers a lifetime guarantee. Returns for damaged items are covered by insurance; non-damaged returns incur return delivery costs.

Price Match Guarantee +

We will match any price like for like. If you find it cheaper within 48 hours, we'll refund the difference.

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Read our buyers guide for this Screw-FIX Adaptor to SW, 1mm - Ø 125

National Flues Ltd Verdict

The Screw-Fix Adaptor to SW, 1mm - Ø 125 is an exceptional product for creating a seamless transition in flue systems. Rarely beaten on price and providing reliable delivery nationwide, National Flues proudly serves both retail and trade customers with top-notch customer service.

The Screw-Fix Adaptor to SW, 1mm - Ø 125 is used to create a reliable connection between a rigid single wall flue system and a MI-FLEX flexible flue liner of the same diameter.

National Flues is a trusted supplier of high-quality fireplaces and flues across the UK, offering unbeatable prices, reliable delivery, and exceptional service to retail and trade customers.

 

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Transform your flue setup today – add this dependable adaptor to your basket and ensure your system’s safety and efficiency.

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