Screw-FIX Increaser - Ø 80-100mm (25-80-MR)
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Fast deliveryTuesday, October 28th*
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Price matchWe’ll match like-for-like
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Delivery Information* +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, October 28th. This is based on current lead times. Bear in mind that it is a busy time of year. If you need a stove, or other bulky product, to be delivered by a specific time in the next 7 days, then please give us a call on 01670 206 999. We can sometimes 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 and you can read in our blog about they types and terms and conditions for warranties. Mi-Flex flue liner, for example, comes with a lifetime guarantee. Give us a call if you want to know about a specific warranty. Returns for damaged items are covered by insurance; non-damaged returns incur return delivery costs.
About National Flues Ltd +
We began over 30 years ago as a fireplace shop in the North East. We now supply hundreds of trade professionals and thousands of retail customers, all across the UK, every month. We are still a family owned business, lead by the MD Neil, and always try our best to deliver the best possible experience. We also price match, so give us a call if you find this cheaper and want to buy from us. Visit our about us page to read a bit more.
At a Glance
- 0.6mm 316 stainless steel construction for exceptional durability
- Compatible connection between rigid single wall and MI-FLEX flexible flue liners
- Compliant with Building Regulations Document J for safe installations
- Versatile use with wood, oil, gas, and smokeless coal appliances
- Simple and reliable installation secured with fire cement, ceramic rope, or high-temperature sealant
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]
- Details
- Specs
- Install
- FAQs
Introducing the Screw-FIX Increaser - Ø 80-100mm, a premium 0.6mm 316 stainless steel adaptor designed for seamless transitions between a rigid single wall flue system and MI-FLEX flexible flue liners. This increaser plays a vital role in establishing a secure, gas-tight connection and complies with Building Regulations Document J, ensuring the flue liner is fully enclosed within a masonry chimney. Suitable for appliances operating up to 600°C (T600 designation), it's versatile for use with wood (moisture <20%), smokeless coal, gas, and oil.
Essential in creating a full chimney system, the Screw-FIX Increaser incorporates fire cement, ceramic rope, or high-temperature sealant for optimal performance. Maintenance is straightforward: simply ensure regular chimney sweeping by a competent person, ideally twice a year for solid fuel applications to avoid blockages and deposits.
SKU: 25-80-MR
| Technical Specifications | |
|---|---|
| Material | 316L Stainless Steel |
| Design | 0.6mm stainless steel adaptor |
| Size | Ø80-100mm |
| Temperature Rating | Up to 600°C (T600 designation) |
| Fuel Compatibility | Wood (<20% moisture), Smokeless Coal, Gas, Oil |
| Compliance | Building Regulations Document J, CE / HETAS |
What our experts say!
"Our Screw-FIX Increaser - Ø 80-100mm is indispensable for a flawless flue system. With nationwide delivery and prices rarely beaten, National Flues serves both retail and trade customers, ensuring top-notch quality and reliable service."
The Screw-FIX Increaser - Ø 80-100mm is used to connect a rigid single wall flue system to a MI-FLEX flexible flue liner, ensuring a gas-tight transition and secure connection within a masonry chimney.
National Flues is a premier UK supplier specialising in fireplaces and flues. Known for competitive pricing and reliable delivery, they cater to both retail and trade customers with secure online payments and trade accounts available.
