Free Delivery over £100+ 5on Trustpilot Browse our popular stoves Fast Mainland UK Delivery Buy stoves with install packs Call 01670 206 999 for help

Top clamp - Ø 100 (20-100-C)

National Flues proudly presents the Top Clamp Ø 100, a premium chimney accessory designed for secure installation of MI-FLEX flexible flue liners. This top clamp, crafted from high-quality 316L stainless steel, offers reliable support for your chimney system and complies with Building Regulations. Read more...
Now only £9.99
Give us a call if you find it cheaper and we'll normally price match.
  • Fast deliveryMonday, November 17th*
  • Best PriceCall us to beat any price you found online.
  • Secure checkoutCard· Google/Apple Pay· Klarna· Paypal

 

Payment Options

At a Glance

  • Made from high-grade 316L stainless steel for exceptional durability
  • Specifically engineered for MI-FLEX flexible flue liners
  • Provides secure, vertical support for chimney systems
  • Compliant with Building Regulations Document J
  • Suitable for wood, smokeless coal, gas, and oil applications
  • Works perfectly with a top plate and top insert sleeve for additional stability

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

The Top Clamp Ø 100 from National Flues is an essential component designed for use with MI-FLEX 316 and 904 flexible flue liners. Part of the MF20 MI-FLEX accessories, this top clamp plays a crucial role in securing the vertical weight of your flue liner, ensuring a stable and fully operational chimney system. This fitting is indispensable for those seeking to comply with Building Regulations Document J, which mandates the use of enclosed masonry chimneys for flexible flue liners.

Ideal for appliances operating up to 600°C (T600 designation), it is compatible with wood burning (moisture content < 20%), smokeless coal, gas, and oil. The clamp functions perfectly with a Top Plate and Top Insert Sleeve to support the liner at the stack's top, ensuring weatherproofing and structural integrity.

SKU: 20-100-C

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.

Technical Specifications
SKU20-100-C
Product NameTop Clamp - Ø 100
Rating9.7/10
Material316L Stainless Steel
Colour FinishNatural / Stainless Steel
SystemMI-FLEX Accessories MF20
ApprovalsHETAS / CE
Temperature RatingUp to 600°C
Fuel CompatibilityWood, Oil, Gas, Smokeless Coal
StockIN STOCK (38)
Pricing£6.46 (Our Price), £9.49 (Retail)
Before installation, ensure your chimney is a fully enclosed masonry structure in compliance with Building Regulations Document J. The Top Clamp Ø 100 must be fitted along with a compatible top plate and top insert sleeve, which together distribute the vertical load of the flue liner. Verify proper weatherproofing and structural integrity prior to installation. It is essential that the installation is executed by a competent professional. Regular annual inspections and bi-annual sweeping for solid fuel applications are recommended to maintain optimal performance and safety.

The Top Clamp Ø 100 is used to support the vertical weight of MI-FLEX flexible flue liners, working in conjunction with a Top Plate and Top Insert Sleeve to provide essential stability at the top of the chimney stack.

Yes, it is suitable for use with wood (moisture content < 20%), smokeless coal, gas, and oil, making it highly versatile for various heating systems.

Yes, the chimney stack must be fully weatherproofed, structurally sound, and all chimney pots must be in good condition with appropriate flaunching at the top of the stack.

Absolutely. It complies with Building Regulations Document J, which requires flexible flue liners to be installed within a fully enclosed masonry chimney.

The chimney system should be cleaned and inspected at least once a year. For solid fuel appliances, it is recommended to sweep the chimney twice a year - at the end of the heating season and at the start of the next season.

No, flexible flue liners must be installed within a fully enclosed masonry chimney. Non-masonry enclosures like timber or plasterboard are not acceptable.

Chimney sweeping should be carried out by a competent person. For solid fuel applications, it is recommended to use HETAS registered sweeps.

 

Call the Experts   8am-5pm
👀 6 people watching this