Joiner - Ø 300 (20-300-J)
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Fast deliveryMonday, November 17th*
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Best PriceCall us to beat any price you found online.
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At a Glance
- Seamless connection for MI-FLEX multi-fuel flue liners
- Constructed from robust 316L stainless steel
- Withstands temperatures up to 600°C
- Compatible with wood (with <20% moisture), oil, gas, and smokeless coal
- Fully compliant with Building Regulations Document J
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: sales@nationalflues.com
- Details
- Specs
- Install/Packs
- FAQs
The Joiner - Ø 300 is a crucial accessory designed to join two pieces of MI-FLEX multi-fuel flexible flue liner seamlessly. Perfectly crafted to complement MI-FLEX 316 and 904 flexible flue liners, this joiner ensures a continuous and secure connection for an efficient full-system chimney. Adhering to Building Regulations Document J, this joiner must be used within a completely enclosed masonry chimney – timber or plasterboard enclosures are not permissible.
Capable of handling temperatures up to 600°C, it is ideal for wood with less than 20% moisture, smokeless coal, gas, and oil. When your chimney liner length exceeds the maximum available flex, the Joiner - Ø 300 offers the perfect solution, though it must not be used with gas liners. Maintenance is straightforward, requiring professional sweeping, ideally by a HETAS registered sweep, at least twice a year for solid fuel applications.
SKU: 20-300-J
Delivery Information* +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Monday, November 17th. This is based on current lead times. Bear in mind that it is a busy time of year. If you need a product delivered by a specific time in the next 7 days, then please give us a call on 01670 206 999. Visit our Shipping Information page for more information.
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.
This is us — real advice over the phone, or at the counter, and real stock in our warehouse.
| Technical Specifications | |
|---|---|
| SKU | 20-300-J |
| Material | 316L Stainless Steel |
| Colour Finish | Natural / Stainless Steel |
| Temperature Rating | Up to 600°C |
| Fuel Compatibility | Wood (<20% moisture), Oil, Gas, Smokeless Coal |
| Certifications | HETAS, CE |
| Compliance | Building Regulations Document J |