TWPro MB - Flat Increasing Adaptor - Ø 125-150mm
At a Glance
- HETAS Approved and CE marked for safety compliance
- Constructed with 0.4mm thick 304 stainless steel (outer) and 316L stainless steel (inner)
- Flat increasing design offering a compact solution for transitioning between flue systems
- Insulated with dense, compressed rockwool (200kg/m³) for superior thermal performance
- Versatile use with woodstoves, oil boilers, gas boilers, and solid fuel appliances
- Includes a Locking Band for secure, easy installation

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 125-150mm is a versatile and essential component for connecting your appliance outlet to a TWPro system or transitioning from single wall connecting flue or vitreous enamel to TWPro. Its flat design ensures a smooth and efficient transition over the shortest length. **Application**: Perfect for use with a variety of appliances including woodstoves, gas coal effect fires, oil boilers, gas boilers, and any solid fuel appliances. This adaptor ensures optimal performance and safety.**Construction**: Crafted with an outer skin of 0.4mm thick 304 stainless steel, coated in a high-temperature black finish.
The inner skin is made of 0.4mm thick 316-grade stainless steel. The component is fully insulated with compressed rockwool, providing a density of 200kg/m3, and all parts are fully welded for maximum durability. **Approvals**: TWPro products are HETAS Approved and CE marked, signifying compliance with strict European standards. Designation numbers: EN1856-1 T600 N1 W V2 L50040 G50 and EN1856-1 T200 P1 W V2 L50040 O20.**Installation**: Easy to install using the supplied Locking Band, ensuring a secure connection.
Maintain a safety clearance of 50mm from the flue's exterior to any combustible materials like wood or plasterboard.
SKU: 37-125-009
Technical Specifications | |
---|---|
Adaptor Type | Flat Increasing Adaptor |
Diameter Increase | u00d8 125mm to u00d8 150mm |
Outer Material | 304 Stainless Steel with high temperature black coating (0.4mm thick) |
Inner Material | 316L Stainless Steel (0.4mm thick) |
Insulation | Compressed Rockwool, 200kg/mu00b3 |
Certifications | HETAS Approved, CE Marked |
Installation Accessories | Includes Locking Band |
Minimum Clearance | 50mm from flue exterior to any combustible material |
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 is an exceptional choice for both trade and retail customers looking for high-quality flue components. Our expert team at National Flues highly recommends this adaptor for its robust construction and versatility. Enjoy reliable delivery across the UK.
This product is designed to connect an appliance outlet to a TWPro increasing adaptor, or transition from a single wall connecting flue or vitreous enamel to TWPro.
TWPro is a trusted brand known for its high-quality flue solutions. All products in the TWPro range are designed for optimal performance, durability, and compliance with stringent safety standards.
