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Non-concentric increaser - Ø 250 (3-250-004)

National Flues presents the Non-Concentric Increaser - Ø 250, a premium accessory crafted from high-quality 316L Stainless Steel. Designed to enhance both industrial and residential flue systems, this increaser is a vital component in the SWPro modular range. It is ideal for boosting flue diameters in boilers, ovens, and ventilation systems while preventing condensate pooling. With CE marking and full EN 1856-1 compliance, this product stands out as a reliable, efficient, and durable solution, making it essential for anyone looking to optimise their flue system.
£134.99
with free delivery Give us a call if you find it cheaper and we'll try to price match.

 

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At a Glance

    Premium 316L Stainless Steel construction
    Compatible with the SWPro modular flue system
    Efficient diameter increaser to prevent condensate pooling
    Suitable for both high and low-temperature, condensing and non-condensing applications
    CE marked and compliant with EN 1856-1 standards
    Versatile use for boilers, ovens, and ventilation systems
    Secure push-fit jointing system with a Locking Band
    Designed for high-pressure installations with gasket use
    Maintains a safe 50mm distance from combustibles
    Backed by a 10-year warranty

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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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:

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Price Match Guarantee: If you find the same product cheaper within 48 hours, we’ll match it and refund the difference.

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

The Non-concentric increaser - Ø 250 is an essential component in the SWPro modular single wall flue system. Manufactured from premium 316L stainless steel, this increaser is designed to boost the diameter of your flue system efficiently. Suitable for both high and low-temperature applications, non-condensing and condensing systems, it ensures no condensate pooling thanks to its intelligent design.

CE marked and compliant with EN 1856-1 standards, it promises reliability and safety. Whether you need it for boilers, ovens, ventilation systems, or as a chimney shaft liner, this increaser fits perfectly with a push-fit jointing system secured by a Locking Band. For high-pressure installations (P1 and H1), make sure to fit jointing gaskets on every join, maintaining a 50mm clearance from combustible materials.

SKU: 3-250-004

Technical Specifications
SKU3-250-004
Product NameNon-Concentric Increaser - u00d8 250
DimensionsDesigned for flue systems from u00d8 250 up to u00d8 400
Inner Material316L Stainless Steel
Outer MaterialN/A
FuelsGas, Oil
ApprovalsCE, EN 1856-1
Distance To Combustibles50mm
Warranty10 Years
SystemSWPro
JointingPush-fit jointing with Locking Band; use jointing gaskets for P1/H1 installations
Installation is straightforward: use the push-fit jointing system with the Locking Band to secure the connection. For high-pressure systems (P1 and H1), ensure that jointing gaskets are installed at every join. It is imperative to maintain a 50mm clearance from any combustible material to adhere to safety regulations. Always consult the manufacturer's guidelines and, if needed, seek professional assistance to guarantee compliance with local building codes.

The Non-Concentric Increaser - Ø 250 is constructed from high-grade 316L stainless steel, ensuring durability and corrosion resistance.

Yes, the Non-Concentric Increaser - Ø 250 is designed for use in both high and low-temperature applications, as well as non-condensing and condensing systems.

The Non-Concentric Increaser - Ø 250 is CE marked and complies with EN 1856-1 standards, ensuring high quality and safety.

Absolutely. The Non-Concentric Increaser - Ø 250 is ideal for a wide range of applications, including boilers, ovens, and ventilation systems.

This increaser features a modular, push-fit jointing system secured with a Locking Band. For P1 and H1 installations, ensure to use jointing gaskets and maintain a 50mm clearance from combustible materials.

The increaser is designed to fit flue systems from Ø 250 up to Ø 400, as specified under EN 1856-1 designations.

Yes, as part of National Flues’ commitment to quality, the Non-Concentric Increaser - Ø 250 includes a warranty. Please refer to our warranty policy for more details.
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, May 20th. Delivery times of products not in our warehouses depend on product availability and shipping. If you need a definitive delivery time give us a call. If you need faster stove or fireplace delivery please also 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. 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 on a retail basis. Give us a call if you find it cheaper and want to buy from us.

Read our review in our Non-concentric increaser - Ø 250 buyers guide

Enhance your installation with the Non-Concentric Increaser - Ø 250 and enjoy reliable performance; buy now!

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