Screw-FIX Adaptor to SW - Ø 125
At a Glance
- - 0.6mm 316L stainless steel construction for enhanced durability
- - Specifically engineered for MI-FLEX 316 and 904 flexible flue liners
- - Creates a secure, gas-tight transition from rigid single wall flue to flexible lining
- - Complies with Building Regulations Document J for safe operation up to 600°C
- - Versatile compatibility with wood (under 20% moisture), smokeless coal, gas, and oil

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 Single Wall Flue - Ø 125 is a high-quality 0.6mm 316 stainless steel accessory, designed for seamless integration with MI-FLEX 316 and 904 flexible flue liners. This adaptor is perfect for creating a complete transitional joint from a rigid single-wall connecting flue system to MI-FLEX flue liners of the same nominal diameter. Built to comply with Building Regulations Document J, this adaptor ensures that your flexible flue liner is securely enclosed within a masonry chimney, making it suitable for appliances that operate up to 600°C (T600 designation).
Whether you are burning wood with less than 20% moisture, smokeless coal, gas, or oil, this adaptor facilitates a gas-tight seal using fire cement, ceramic rope, or high-temperature sealant. Furthermore, it supports easy sweeping and maintenance, essential for maintaining optimal performance and safety.
SKU: 25-125-MAE
Technical Specifications | |
---|---|
Material | 316L Stainless Steel |
Thickness | 0.6mm |
Diameter | u00d8 125 |
Flue System Compatibility | MI-FLEX 316 and 904 |
Certification | CE / HETAS Compliant |
Temperature Rating | Up to 600u00b0C (T600) |
Fuel Compatibility | Wood (<20% moisture), Smokeless Coal, Gas, Oil |
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 Single Wall Flue - Ø 125 is an essential component for any chimney system using MI-FLEX flexible flue liners. At National Flues, we pride ourselves on offering reliable delivery across the UK to both retail and trade customers.
The Screw-FIX Adaptor to Single Wall Flue - Ø 125 is designed to create a secure, gas-tight connection between a rigid single-wall flue system and a MI-FLEX flexible flue liner of the same diameter.
National Flues is a leading supplier of fireplaces and flues in the UK, known for reliable delivery and competitive pricing. We serve both retail and trade customers with secure online payment options and dedicated trade accounts.
