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TWPro MB - 135° Tee - Ø 125 (37-125-034)

The TWPro MB 135° Tee – Ø 125, a premium chimney component from National Flues, combines superior design with robust materials for optimal flue performance. Ideal for wood stoves, gas and oil boilers, and other heating appliances, this twin wall insulated chimney accessory guarantees safe and efficient heat management. Trusted across the UK, TWPro stands as a hallmark of quality, offering reliable, high-performance solutions for maintenance-conscious homeowners and professional installers alike.
The price you pay today £200.99
including free delivery Give us a call if you find it cheaper and we'll normally price match.

 

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At a Glance

    Designed for optimal cleaning access at the base of your chimney system
    Robust dual-layer stainless steel construction (304 outer, 316L inner) with high-temperature black coating
    Engineered for compatibility with solid fuel, gas, and oil appliances
    Integrated compressed rockwool insulation (200kg/m³) for excellent thermal efficiency
    HETAS approved and CE marked for guaranteed safety and quality
    Includes a secure locking band ensuring a tight, reliable fit with a minimum 50mm clearance from combustibles
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, July 1st. This is based on current delivery times for this product. Delivery for products not in our warehouses can be delayed because of third party carriers. If you need a stove, or other bulky product, to be delivered by a specific time in the next 7 days then please give us a call. We can sometimes 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 and you can read in our blog about they types and terms and conditions for warranties. Mi-Flex flue liner, for example, comes with a lifetime guarantee. Give us a call if you want to know about a specific warranty. 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, on a retail basis. Give us a call if you find it cheaper and want to buy from us.

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]

The TWPro MB 135° Tee Ø 125 is engineered for exceptional performance and reliability. Ideal for solid fuel, gas, and oil appliances including wood stoves, gas coal effect fires, oil boilers, and gas boilers. This component features robust construction with an outer skin made from 0.4mm thick 304 stainless steel, finished in a high-temperature black coating.

Its inner skin is crafted from 0.4mm thick 316 grade stainless steel, ensuring durability and resistance to corrosion. The insulation comprises compressed rockwool with a density of 200kg/m³ to provide excellent thermal efficiency. Fully welded components guarantee structural integrity.

The TWPro system is HETAS approved and CE marked, highlighting its quality and compliance with safety standards. Maintaining a safe distance of 50mm from combustibles is critical for installation. The integrated locking band facilitates secure and straightforward assembly.

SKU: 37-125-034

Technical Specifications
SKU37-125-034
Outer Material304 Stainless Steel (0.4mm thick, High-Temperature Black Coated)
Inner Material316L Stainless Steel (0.4mm thick)
InsulationCompressed Rockwool (200kg/mu00b3)
Fuel CompatibilityWood, Oil, Gas, Low Sulphur Coal
CertificationHETAS Approved, CE Marked
ClearanceMinimum 50mm from combustibles
Design135u00b0 Tee shape for optimal flue gas flow and cleaning access
SystemTWPro Black
Before commencing installation, ensure the chimney system is de-energised and cooled. Use the included locking band to securely join the TWPro MB 135° Tee to your existing flue system. Maintain a clearance of at least 50mm from any combustible materials, including plaster, wood, or insulation. Ensure all connections are fully welded and sealed to prevent heat loss and maintain structural integrity. Follow the manufacturer’s guidelines and, if in doubt, consult a certified installer to guarantee a safe and compliant installation.

The TWPro 135° Tee is compatible with solid fuel, gas, and oil appliances such as woodstoves, gas coal effect fires, oil boilers, and gas boilers.

The outer skin is made from 304 stainless steel (0.4mm thick) with a high-temperature black finish, and the inner skin is made from 316 grade stainless steel (0.4mm thick).

The insulation is compressed rockwool with a density of 200kg/m³, ensuring excellent thermal efficiency.

Yes, the TWPro 135° Tee is both HETAS approved and CE marked, meeting stringent safety and performance standards.

The TWPro 135° Tee is secured using a locking band (included), ensuring a secure connection. Keep a 50mm gap from any combustible materials.

The 135° angle aids in cleaning access at the base of the chimney while ensuring smooth flow of flue gases without restrictions.

A minimum clearance of 50mm from plasters, wood, or any other combustible materials is required for safe installation.

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