90° Reducing Tee Ø 125
At a Glance
- Constructed with dual stainless steel layers: 304 outer and 316 inner (0.40mm each)
- Fully welded design for enhanced durability
- Complies with HETAS and CE standards
- Insulated with 200kg/m3 compressed rockwool for optimal thermal efficiency
- Engineered for cascade boiler systems with 50mm clearance 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 90° Reducing Tee Ø 125 is designed to connect multiple boilers, creating a seamless full system. This crucial flue component is perfect for solid fuel and gas/oil appliances such as wood stoves, gas coal effect fires, and boilers. Constructed with an outer skin of 304-grade stainless steel and an inner skin of 316-grade stainless steel, both 0.4mm thick, it ensures maximum durability.
The insulation comprises compressed rockwool with a density of 200kg/m3. Fully welded and maintaining a 50mm distance to combustibles, it meets the highest safety standards. It carries HETAS approval and CE marking with Designations EN1856-1 T600 N1 W V2 L50040 G50 and EN1856-1 T200 W V2 L50040 O20, affirming its quality and safety.
Installation is straightforward with the TWPro Twin Wall Insulated Chimney parts, secured together using a Locking Band.
SKU: 2-125-040
Technical Specifications | |
---|---|
Designations | EN1856-1 T600 N1 W V2 L50040 G50 and EN1856-1 T200 W V2 L50040 O20 |
Material | Inner: 316L Stainless Steel (0.40mm thick), Outer: 304 Stainless Steel (0.40mm thick) |
Insulation | Compressed rockwool, 200kg/m3 |
Approvals | HETAS, CE Marking |
Combustible Clearance | 50mm |
Usage | Suitable for solid fuel and gas/oil appliances |
Installation System | TWPro Twin Wall Insulated Chimney with Locking Band |
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Friday, April 4th. 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.
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National Flues Ltd Verdict
The 90° Reducing Tee Ø 125 is a top-tier, durable flue component that perfectly complements your heating system. National Flues offers nationwide delivery and caters to both retail and trade customers.
The 90° Reducing Tee Ø 125 is used to connect multiple boilers in cascade systems, effectively channeling exhaust gases from solid fuel and gas/oil appliances.
National Flues supplies high-quality fireplaces and flues to retail and trade customers across the UK. Known for reliability, competitive pricing, and excellent service.
