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Boiler adaptor - Ø 400 (3-400-BA-353)

National Flues presents the Boiler Adaptor - Ø 400, a premium SWPro single wall flue connector crafted from 316L stainless steel. Engineered for both boilers and ovens, this adaptor meets EN 1856-1 standards and is ideal for handling both condensing and non-condensing flue gases. Perfect for professionals and DIY enthusiasts alike, its robust design and superior performance make it a standout accessory in the UK heating industry.
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£176.99
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

  • 316L Stainless Steel construction
  • High-pressure P1/H1 sealing gasket
  • Push-fit jointing system with locking band
  • CE marked and EN 1856-1 compliant
  • Versatile for condensing & non-condensing applications

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:

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

Our Boiler adaptor - Ø 400 is part of the SWPro modular single wall flue system. Constructed from 316L grade stainless steel, this high-quality adaptor features a high-pressure P1/H1 sealing gasket, making it versatile for both high and low-temperature applications. Suitable for non-condensing and condensing flue gases in positive and negative pressure, this adaptor is ideal for various uses including boilers, ovens, ventilation systems, and as a chimney shaft liner.

The SWPro system is CE marked and has passed rigorous EN 1856-1 standards, ensuring unbeatable performance and safety. Each module easily connects with a push-fit jointing system, secured by a locking band, and requires jointing gaskets in P1 and H1 installations for maximum efficiency.

SKU: 3-400-BA-353

Technical Specifications
Material316L Stainless Steel
Design StandardEN 1856-1
Seal TypeHigh-pressure P1/H1 sealing gasket
Installation MethodPush-fit jointing system secured by a locking band
ApplicationsBoilers, ovens, ventilation systems, chimney shaft liners
Operating ConditionsSuitable for both condensing and non-condensing flue gases
Clearance Requirement50mm from combustible materials
CertificationsCE marked
Warranty10 Years
For optimal installation, begin by cleaning all components. Utilize the push-fit jointing system to connect the adaptor, securing each joint with the locking band. Install jointing gaskets at every connection point for P1 and H1 installations to ensure a proper seal. When connecting to condensing appliances, apply silicone sealant at the adaptor and appliance outlet (unless the appliance has an integrated seal). Maintain a minimum 50mm clearance from any combustible material to comply with safety guidelines.

The Boiler Adaptor - Ø 400 is made from high-grade 316L stainless steel.

Yes, the adaptor is suitable for both high and low temperatures and can handle both condensing and non-condensing flue gases.

The installation requires a push-fit jointing system secured by a locking band. For P1 and H1 installations, jointing gaskets must be fitted at every joint. Ensure a 50mm clearance from any combustible materials.

The SWPro system is CE marked and has been tested under the EN 1856-1 standards.

For condensing appliances, the adaptor and appliance outlet should be sealed with silicone sealant unless the appliance already incorporates a seal at the outlet.

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

Yes, the product includes a locking band for secure connection.
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Thursday, May 1st. 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 Boiler adaptor - Ø 400 buyers guide

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