Boiler adaptor - Ø 300
At a Glance
- Constructed from high-grade 316L stainless steel for superior durability and corrosion resistance
- Versatile design compatible with boilers, ovens, ventilation systems, and chimney shaft liners
- Supports both condensing and non-condensing applications
- Meets EN 1856-1 standards and carries the CE mark for safety
- Features an easy-to-install push-fit joint system secured with a Locking Band

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 is a vital component of the SWPro modular single wall flue system, designed for seamless integration with your heating appliances. Fabricated from 316L grade stainless steel, this adaptor boasts exceptional durability and resistance to corrosive flue gases. The SWPro system is recognized for its versatility, addressing both high and low-temperature applications, whether they are condensing or non-condensing.
The system supports positive and negative pressure scenarios, making it a universal solution for boilers, ovens, ventilation systems, and chimney shaft liners. The easy-to-install, push-fit jointing system secures with a Locking Band, ensuring a tight seal for optimal performance. When dealing with condensing appliances, a silicone sealant is recommended to prevent leaks unless the appliance outlet itself is sealed.
The CE mark and compliance with EN 1856-1 standards further affirm its quality and safety.
SKU: 3-300-BA-348
Technical Specifications | |
---|---|
Material | 316L Stainless Steel |
Compatible Applications | Boilers, ovens, ventilation systems, chimney shaft liners |
Sealing System | Push-fit jointing with Locking Band (use silicone sealant for condensing appliances unless already sealed) |
Standards | EN 1856-1 compliant, CE marked |
Fuel Types | Gas, Oil |
Clearance | Minimum 50mm from combustible materials |
Warranty | 10 Years |
System | SWPro Modular Single Wall Flue System |
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
The Boiler Adaptor Ø 300 is a top-tier product in our extensive range. It's versatile, durable, and built to perform excellently in both residential and commercial settings. At National Flues, we rarely get beaten on price and offer reliable nationwide delivery. Whether you're a retail or trade customer, we've got you covered.
The Boiler Adaptor Ø 300 is used to connect the SWPro modular flue system to heating appliances, ensuring efficient and safe operation.
National Flues is a leading supplier of fireplaces and flues across the UK, known for competitive prices, reliable delivery, and excellent customer service for both retail and trade customers.
