× 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 100 (25-100-MAE)

Discover the superior Screw-FIX Adaptor to SW - Ø 100 from National Flues – an essential flue accessory for connecting rigid systems to MI-FLEX liners. Expertly engineered from premium 316L stainless steel, this adaptor offers unmatched durability, safety, and versatility across various fuel types, making it a top choice for efficient and compliant fireplace installations.
Hover to Zoom / Click for Gallery
£13.99
Give us a call if you find it cheaper and we'll try to price match.

 

Payment Options

At a Glance

  • Made from 0.6mm 316L stainless steel for enhanced durability and corrosion resistance
  • Securely connects rigid single-wall flue systems to MI-FLEX flexible liners
  • Suitable for multiple fuel types: wood (<20% moisture), oil, gas, and smokeless coal
  • Withstands temperatures up to 600°C for high performance in demanding conditions
  • Complies with UK Building Regulations (Document J), CE, and HETAS standards
  • Readily available in stock with reliable nationwide delivery

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 SW - Ø 100 is crafted from 0.6mm 316 stainless steel, making it a robust and essential accessory for connecting rigid single-wall flue systems to MI-FLEX flexible liners. Designed for multi-fuel applications including wood with less than 20% moisture, smokeless coal, gas, and oil, this adaptor ensures a seamless and secure transition, adhering to Building Regulations Document J. The adaptor must be used inside a masonry chimney to comply with safety standards.

It can withstand temperatures up to 600°C, and installation should include fire cement, ceramic rope, or high-temperature sealant to achieve a gas-tight fit. Regular sweeping and maintenance by a competent person are essential to sustain the system’s efficiency and longevity.

SKU: 25-100-MAE

Technical Specifications
Material0.6mm 316L Stainless Steel
FinishNatural Stainless Steel
Temperature RatingUp to 600u00b0C
ApplicationConnecting rigid single-wall flue to MI-FLEX liners
Fuel TypesWood (<20% moisture), Oil, Gas, Smokeless Coal
ComplianceCE / HETAS, UK Building Regulations Document J
Ensure the adaptor is installed inside a masonry chimney in accordance with UK Building Regulations. Begin by preparing and cleaning the chimney, then fit the adaptor securely between the rigid flue and the MI-FLEX liner. Use a high-quality fire cement, ceramic rope, or high-temperature sealant to achieve a gas-tight connection. Optional accessories, such as additional sealants and chimney cleaning tools, can further enhance the installation. Always have the system inspected periodically by a competent professional to maintain safety and performance.

It's used for connecting rigid single-wall flue systems to MI-FLEX flexible liners, ensuring a seamless, secure transition.

Yes, it is suitable for use with wood (under 20% moisture), smokeless coal, gas, and oil.

No, UK Building Regulations require that flexible flue liners must be installed within a masonry chimney.

It can handle temperatures up to 600°C (T600 designation).

Use fire cement, ceramic rope, or high-temperature sealant to secure the connection between the adaptor and flue liner.

Maintenance should be done by a competent person, ideally a HETAS registered sweep for solid fuel appliances.

For solid fuel chimneys, sweeping should be done at least twice a year: once at the end of the heating season and once before the start of the next season.
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 100 buyers guide

Order now for reliable, durable performance that meets all safety standards.

Your recently viewed products:

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