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Tee 90° reduced connection Ø 175 - Ø 300 (3-300-R90-175)

Discover the Tee 90° Reduced Connection from National Flues – a high-quality SWPro flue component designed to deliver superior performance in cascade header systems. This reduced connection, made from 316L stainless steel, is engineered for reliability in boilers, ovens, and ventilation systems. Its robust build, combined with a secure push-fit jointing system, makes it an essential accessory for those looking to enhance their flue systems. Explore our range of complementary accessories to compl Read more...
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At a Glance

    Made from high-grade 316L stainless steel
    Designed for cascade header systems
    Push-fit jointing system with a secure Locking Band
    High-pressure sealing gaskets (P1/H1) for leak-free installation
    CE marked to meet strict safety standards
    Suitable for boilers, ovens, ventilation systems and chimney shaft liners
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, June 17th. 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.

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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.

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Please Note: All dimensions refer to the internal diameter of flues. If unsure, please call 01670 206999 to ensure you choose the correct products.

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Have Questions?
Phone: 01670 206999
Email: [email protected]

The Tee 90° reduced connection Ø 175 - Ø 300 is a versatile and essential component for any advanced flue system. Designed for cascade header systems, this reducing tee is constructed from high-grade 316L stainless steel, ensuring unmatched durability and resistance to high temperatures. It features high-pressure sealing gaskets P1/H1, making it suitable for non-condensing and condensing applications.

This modular flue system is ideal for boilers, ovens, ventilation systems, and chimney shaft liners. The push-fit jointing system, complete with a Locking Band, ensures straightforward installation, and the system is CE marked for compliance and safety.

SKU: 3-300-R90-175

Technical Specifications
Material316L Stainless Steel
Connection Sizeu00d8175 - u00d8300
Pressure SealsP1/H1 High-pressure sealing gaskets
InstallationPush-fit jointing system with Locking Band
StandardsCE Marked, EN 1856-1 compliant
Suitable FuelsGas, Oil
Distance To Combustibles50mm
Warranty10 Years
ApplicationsBoilers, ovens, ventilation systems, chimney shaft liners
Before installation, ensure all connecting surfaces are clean and free from debris. The Tee 90° Reduced Connection is installed using a simple push-fit system: 1. Verify that the components and accessories required for your flue system are available. 2. Apply the high-pressure sealing gaskets to the connection areas to ensure a secure, leak-free fit. 3. Insert the connection firmly and utilise the provided Locking Band to secure the joint. 4. Check that the assembly aligns correctly with the cascade header system and meets the necessary clearance from combustibles (at least 50mm). 5. For safety, review the CE marking documentation to ensure compliance with EN 1856-1 standards. Note: This product is intended for non-condensing systems only. Always refer to the detailed installation manual and local regulations before commencing installation.

The Tee 90° Reduced Connection Ø 175 - Ø 300 is made from high-grade 316L stainless steel.

No, this reducing tee is not suitable for condensing systems.

This product is ideal for boilers, ovens, ventilation systems, and chimney shaft liners.

The Tee 90° Reduced Connection features a modular push-fit jointing system that is secured using a Locking Band for easy installation.

The product complies with EN 1856-1 standards:
T200 H1 W Vm L50040 O(50) for Ø 80 to Ø 200, and T200 H1 W Vm L50050 O(50) for Ø 250 to Ø 400.

This model is specifically designed with connections ranging from Ø 175 to Ø 300.

The Tee 90° Reduced Connection is designed to handle high-temperature environments, making it suitable for both high and low-temperature applications.

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