Screw-FIX Adaptor to SW, 1mm - Ø 125
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

We Won't Be Beaten On Price
At National Flues, we continuously monitor competitor prices. This ensures that we consistently offer you the best deals on all our products. Here’s how we keep your costs low:
- Daily Price Matching: Our team adjusts prices to ensure we stay competitive.
- Bulk Purchasing Power: We sell a lot, so we can negotiate better rates with suppliers, passing the savings directly to you.
- Operational Efficiency: We have streamlined processes to reduce overhead.
Price Match Guarantee: If you find the same product cheaper within 48 hours, we’ll match it and refund the difference.
Free Delivery Over £100: Orders over £100 are free delivery (call us if delivery is required outside the mainland UK).
“I saved 20% on my purchase compared to other retailers. Exceptional service!” – Jane D.
Have Questions?
Phone: 01670 206999
Email: [email protected]
- Info
- Specs
- Install
- FAQs
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 | |
---|---|
Material | 316L Stainless Steel |
Nominal Wall Thickness | 1mm |
Nominal Diameter | 125mm (u00d8 125) |
Compatible Liners | MI-FLEX 316 and 904 |
Fuel Compatibility | Wood (<20% moisture), Oil, Gas, Smokeless Coal |
Temperature Rating | Up to 600u00b0C (T600) |
Regulatory Compliance | UK Building Regulations Document J, CE / HETAS |
Installation Accessories | Fire cement, ceramic rope/tape, or high-temperature sealant |
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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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.
