TWPro MB - Flat Increasing Adaptor - Ø 100-125mm
At a Glance
- - HETAS approved and CE marked for safety compliance
- - Robust, fully welded construction with high-temperature black coated finish
- - Seamless transition from Ø100mm to Ø125mm for diverse appliance compatibility
- - Constructed with premium 316L and 304 stainless steel for longevity
- - Easy installation with supplied Locking Band, maintaining a 50mm safe distance from combustibles

Please Note: All dimensions refer to the internal diameter of flues. If unsure, please call 01670 206999 to ensure you choose the correct products.
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]
- Info
- Specs
- Install
- FAQs
The TWPro MB Flat Increasing Adaptor (Ø 100-125mm) is a versatile component designed for seamless connection between your appliance outlet and the TWPro flue system, extending by 25mm. Suitable for solid fuel and gas/oil appliances such as wood stoves, gas coal-effect fires, oil boilers, and gas boilers. The adaptor boasts robust construction with an outer skin made from 304-grade stainless steel (0.4mm thick) coated in a high-temperature black finish.
The inner skin, made from 316-grade stainless steel (0.4mm thick), is insulated with compressed rockwool at a density of 200kg/m3, ensuring excellent thermal resistance. The entire unit is fully welded for enhanced durability. Compliance is guaranteed as the TWPro system is HETAS approved and CE marked with the designation numbers EN1856-1 T600 N1 W V2 L50040 G50 and EN1856-1 T200 P1 W V2 L50040 O20.
Installation is straightforward, using a Locking Band (supplied), and requires maintaining a 50mm distance from any combustible materials like wood or plasterboard.
SKU: 37-100-009
Technical Specifications | |
---|---|
SKU | 37-100-009 |
Model | TWPro MB - Flat Increasing Adaptor |
Size | u00d8100-125mm |
Inner Material | 316L Stainless Steel 0.40mm |
Outer Material | 304 Stainless Steel 0.40mm, High Temperature Black Coated |
Insulation | Compressed Rockwool 200kg/m3 |
Approval | HETAS / CE |
Designation | EN1856-1 T600 N1 W V2 L50040 G50 / EN1856-1 T200 P1 W V2 L50040 O20 |
Compatible Fuels | Wood, Oil, Gas, Low sulphur coal |
Minimum Distance To Combustibles | 50mm |
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Thursday, April 3rd. 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
The TWPro MB - Flat Increasing Adaptor (Ø 100-125mm) is an exceptional product, bringing reliability and efficiency to your flue system. Perfect for both retail customers and trade professionals across the UK, it's rarely beaten on price and supported by our trustworthy delivery service.
The TWPro MB Flat Increasing Adaptor (Ø 100-125mm) is designed to connect the appliance outlet to the TWPro flue system, facilitating a smooth transition and increasing the diameter by 25mm.
National Flues is a leading supplier of high-quality fireplaces and flues, serving retail and trade customers across the UK. Known for competitive pricing, reliable delivery, and exceptional customer service.
