Screw-FIX Top Hat Adaptor - Ø 200
At a Glance
- Premium 316L stainless steel construction
- Complies with Building Regulations Document J
- Secure, gas-tight connection for MI-FLEX flexible flue liners
- Suitable for wood (<20% moisture), smokeless coal, gas and oil appliances
- Designed with a long tail single wall connection and round cover plate for a neat finish
- Versatile use within masonry chimneys

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
- Info
- Specs
- Install
- FAQs
The Screw-FIX Top Hat Adaptor - Ø 200 is a premium quality fitting designed for use with MI-FLEX 316 and 904 flexible flue liners, ensuring a robust and efficient chimney system. This adaptor is part of the versatile MI-FLEX Screw-FIX range, specifically engineered to comply with Building Regulations Document J, requiring the complete enclosure of flexible flue liners inside masonry chimneys. Suitable for appliances up to 600°C (T600 designation), this adaptor supports a variety of fuel types including wood (<20% moisture), smokeless coal, gas, and oil.Perfect for making the transition from a connecting flue system to a flexible flue liner, the Screw-FIX Top Hat Adaptor ensures that the connection is made securely within an existing masonry chimney, thereby maintaining a sleek and professional appearance.
Use fire cement, ceramic rope, or high-temperature sealant to achieve a gas-tight seal. The chimney system must be accessible for regular sweeping and maintenance, ideally performed by a certified professional such as those registered with HETAS. Regular maintenance is essential, especially for solid fuel applications, to prevent blockages and build-up of deposits.
SKU: 25-200-THA
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, April 8th. 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. If you find it cheaper within 48 hours, we'll refund the difference.
Compatible and other products that may be of interest...
National Flues Ltd Verdict
At National Flues, we believe the Screw-FIX Top Hat Adaptor - Ø 200 is an essential component for a secure and efficient chimney system. Ideal for both retail and trade customers, we offer reliable nationwide delivery and competitive prices.
The Screw-FIX Top Hat Adaptor - Ø 200 is designed to create a secure, gas-tight connection between a rigid flue system and MI-FLEX flexible flue liners within a masonry chimney.
National Flues specializes in high-quality fireplaces and flue systems for both retail and trade customers across the UK. Known for reliability and competitive pricing, we offer secure online payments and nationwide delivery to ensure our customers receive the best service.
