Boiler adaptor - Ø 300
At a Glance
- Constructed from high-grade 316L Stainless Steel
- Versatile use with condensing and non-condensing appliances
- CE marked and complies with EN 1856-1 standards
- Simple push-fit jointing system secured with a locking band
- Suitable for boilers, ovens, ventilation systems and chimney liners

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 Boiler Adaptor Ø 300 from National Flues is a premium choice for connecting your SWPro flue system to a variety of appliances. Fabricated from high-grade 316L stainless steel, this adaptor offers durability and efficiency. The SWPro system is modular and single-walled, equipped with a high-pressure sealing gasket (P1/H1), making it versatile for both high and low temperature applications.
Whether you're dealing with non-condensing or condensing applications, this adaptor can handle positive and negative pressure flue gases with ease. It’s perfect for use with boilers, ovens, and even as a chimney liner. The construction varies in thickness depending on the flue diameter, ensuring optimal performance.
This product is CE marked and adheres to EN 1856-1 standards. Installation is straightforward with a push-fit jointing system, secured by a locking band. For P1 and H1 installations, jointing gaskets are required at every joint.
Maintain a safe distance of 50mm from any combustible material to ensure safety.
SKU: 3-300-BA-303
Technical Specifications | |
---|---|
Material | 316L Stainless Steel |
System | SWPro Modular, Single-Walled |
Applications | Boilers, Ovens, Chimney Liners, Ventilation Systems |
Certifications | CE Marked, EN 1856-1 |
Installation | Push-fit joint secured with a locking band; requires jointing gaskets for P1 and H1 installations |
Fuels | Suitable for Gas and Oil applications |
Warranty | 10 Years |
Safe Distance | Maintain 50mm from combustibles |
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Friday, April 25th. 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.
Compatible and other products that may be of interest...
National Flues Ltd Verdict
Our Boiler Adaptor Ø 300 is a top-notch component in the SWPro flue system, crafted from high-quality 316L Stainless Steel. Given our reliable nationwide delivery and unbeatable prices for both retail and trade customers, you can't go wrong with National Flues!
The Boiler Adaptor Ø 300 is designed to connect the SWPro flue system to various appliances, ensuring safe and efficient discharge of flue gases.
National Flues is a leading supplier of high-quality fireplaces and flues, offering unbeatable prices, reliable delivery, and trade accounts nationwide.
