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Boiler adaptor - Ø 125 (3-125-BA-113)

Discover the robust Boiler Adaptor Ø 125 from National Flues, perfectly integrated with the SWPro modular flue system. This high-quality chimney adaptor is designed for both condensing and non-condensing applications, making it an essential component for reliable, high-performance flue installations.
The price you pay today £49.99
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At a Glance

    Durable 316L stainless steel construction
    CE marked and EN 1856-1 compliant
    Versatile for both condensing and non-condensing systems
    Easy push-fit jointing with Locking Band for secure connections
    Maintains 50mm clearance from combustible materials
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.

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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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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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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, crafted from durable 316-grade stainless steel. This versatile adaptor is designed to handle high and low temperature applications, as well as both condensing and non-condensing setups. It features a high-pressure sealing gasket (P1/H1) to ensure secure connections.

Whether you're working with boilers, ovens, ventilation systems, or chimney shafts, this adaptor meets all your needs. The system boasts CE marking and complies with EN 1856-1 standards, ensuring top-notch performance and safety. Installation is straightforward with a push-fit jointing system and Locking Band, requiring jointing gaskets for P1 and H1 setups.

Keep a safe distance of 50mm from any combustible materials.

SKU: 3-125-BA-113

Technical Specifications
Material316L Stainless Steel
SystemSWPro Modular Flue System
CertificationsCE Marked, EN 1856-1 Compliant
ApplicationsBoilers, Ovens, Ventilation Systems, Chimney Shafts
InstallationPush-fit Jointing with Locking Band; Requires Jointing Gaskets for P1/H1
Clearance50mm from Combustible Materials
Fuel TypesGas and Oil
Warranty10 Years
Ensure the flue is installed following manufacturer guidelines. Position the adaptor with a clear 50mm gap to all combustible materials. For condensing appliances, carefully seal the connection using silicone sealant unless an integrated seal is present. Use the push-fit jointing system and secure with the Locking Band. Always verify that jointing gaskets (for P1/H1 systems) are correctly fitted to prevent leaks and ensure safety. Consult a professional if unsure at any stage.

The adaptor is made from high-grade 316L stainless steel, ensuring durability and resistance to corrosion.

Yes, the SWPro system is suitable for both high and low temperature applications, making it versatile for various setups.

The adaptor is CE marked and meets EN 1856-1 standards for safety and performance.

Yes, the adaptor is suitable for condensing applications. Use silicone sealant to seal the joints unless the appliance has an integrated seal at the outlet.

The adaptor installs with a push-fit jointing system and is secured using a Locking Band. Jointing gaskets are required for P1 and H1 installations.

Ensure that there is a distance of at least 50mm from the outside of the flue to any combustible material such as wood or plasterboard.

This adaptor can be used with boilers, ovens, ventilation systems, and as a chimney shaft liner.

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