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Boiler adaptor - Ø 125 (3-125-BA-083)

The Boiler Adaptor Ø 125 by National Flues is a premium solution for connecting your flue system seamlessly. Engineered from 316L stainless steel, this chimney adaptor not only meets strict EN 1856-1 and CE standards but also exemplifies durability and versatility. Ideal for a range of applications, including boilers, ovens, and ventilation systems, the adaptor from National Flues – renowned for quality and reliability – guarantees a secure installation for both condensing and non-condensing env Read more...
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At a Glance

    Constructed from high-grade 316L stainless steel
    Designed for both high and low temperature applications
    Complies with CE and EN 1856-1 standards
    Reliable push-fit jointing system with secure locking band
    Versatile use across boilers, ovens, ventilation systems and chimney liners
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Friday, June 20th. 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.

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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.

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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 Boiler Adaptor Ø 125 is part of the SWPro modular single wall flue system, expertly crafted from top-grade 316L stainless steel. Known for its high-pressure sealing gasket (P1/H1), this adaptor is versatile enough for both high and low temperature operations, supporting non-condensing and condensing environments with flue gases in positive and negative pressure. Notably suitable for a variety of applications including boilers, ovens, ventilation systems, and chimney liners, the SWPro system boasts CE marking and complies with EN 1856-1 standards.

With varying thicknesses depending on the flue diameter, the adaptor connects flawlessly to the appliance. Fitting is a breeze thanks to its push-fit jointing system, secured with a locking band. When used in condensing systems, ensure a sealant like silicone is applied to maintain safety and functionality.

Remember to keep a safe distance of 50mm from any combustible materials during installation.

SKU: 3-125-BA-083

Technical Specifications
Material316L Stainless Steel
ComplianceCE, EN 1856-1
Fuel TypesGas, Oil
SealHigh-pressure sealing gasket (P1/H1)
SystemSWPro
Warranty10 Years
Installation MethodPush-fit joint with locking band
Minimum Distance To Combustibles50mm
The Boiler Adaptor Ø 125 is designed for ease of installation. Begin by ensuring that the appliance connection is clean and free from debris. The adaptor’s push-fit jointing system simplifies the assembly process—slide the adaptor into place and secure it with the provided locking band. For condensing applications, it is essential to apply a silicone sealant at the joint to establish an airtight seal, safeguarding against leakage and ensuring optimal performance. Be mindful of maintaining a minimum distance of 50mm from any combustible material during installation. Always refer to the detailed installation manual supplied with the product for additional guidance and safety precautions.

The Boiler Adaptor Ø 125 is constructed from high-grade 316L stainless steel, ensuring excellent durability and resistance to corrosion.

Yes, the Boiler Adaptor Ø 125 is designed for both high and low temperature applications, supporting both non-condensing and condensing environments.

The Boiler Adaptor Ø 125 is CE marked and complies with EN 1856-1 standards.

The Boiler Adaptor Ø 125 features a push-fit jointing system secured with a locking band. Ensure to use jointing gaskets for P1 and H1 installations and maintain a 50mm distance from combustible materials.

Absolutely, the Boiler Adaptor Ø 125 is ideal for a range of applications including boilers, ovens, and ventilation systems.

For condensing appliances, it is recommended to use silicone sealant to secure the connection unless the appliance already incorporates an outlet seal.

Yes, the Boiler Adaptor Ø 125 includes a locking band to secure the push-fit jointing system.

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