× National Flues
We Won't Be Beaten On Price.
Free Delivery on Orders Over £100
100% 5 Star Reviews on Trustpilot
Free Flue Design Service Available
Need Help? 01670 206999 (8am-5pm)

Screw-FIX Adaptor to SW - Ø 125 (25-125-MAE)

National Flues presents the Screw-FIX Adaptor to Single Wall Flue - Ø 125, a premium accessory engineered for MI-FLEX flexible flue liners. Ideal for converting a rigid single wall flue system to a flexible liner, this adaptor guarantees both safety and performance. Whether you are installing a new chimney or upgrading an existing system, our Screw-FIX Adaptor, crafted from high-quality 316L stainless steel, ensures a secure, compliant, and gas-tight seal. Discover excellence in chimney accessories with National Flues.
Hover to Zoom / Click for Gallery
£15.49
Give us a call if you find it cheaper and we'll try to price match.

 

Payment Options

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]

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
Material316L Stainless Steel
Thickness0.6mm
Diameteru00d8 125
Flue System CompatibilityMI-FLEX 316 and 904
CertificationCE / HETAS Compliant
Temperature RatingUp to 600u00b0C (T600)
Fuel CompatibilityWood (<20% moisture), Smokeless Coal, Gas, Oil
- Ensure the flue liner is completely enclosed within a masonry chimney as per Building Regulations. - Secure the adaptor using a suitable fire cement, ceramic rope, or high-temperature sealant to create a gas-tight seal. - Follow the manufacturer's installation guidelines closely to avoid any potential installation issues. - Regularly schedule chimney sweeping and maintenance, particularly for solid fuel systems, to maintain performance and safety. - Always consult a professional if you are unsure about installation procedures.

The adaptor is made of high-quality 0.6mm 316 stainless steel.

Yes, it is suitable for wood with less than 20% moisture, smokeless coal, gas, and oil.

No, Building Regulations require that the flexible flue liner be completely enclosed inside a masonry chimney.

The adaptor should be secured using fire cement, ceramic rope, tape, or high-temperature sealant for a gas-tight seal.

For solid fuel applications, it's recommended to sweep and inspect the chimney at least twice a year.

No, chemical cleaners or mild steel tools should not be used on stainless steel chimneys.

Yes, it is designed to be used with both MI-FLEX 316 and 904 flexible flue liners.
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Wednesday, April 30th. 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 on a retail basis. Give us a call if you find it cheaper and want to buy from us.

Read our review in our Screw-FIX Adaptor to SW - Ø 125 buyers guide

Compatible and other products that may be of interest...

Upgrade your chimney system now for unmatched safety and performance!

Your recently viewed products:

Multiple Payment Options- including Klarna, Clearpay, Mastercard, Visa and Paypal