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EuroSW1 - Increaser - Ø 125-150mm - Ø 125-150mm (31-125-002)

National Flues offers the EuroSW1 Increaser Ø 125-150mm, a premium stainless steel flue pipe adapter that is ideal for gas, oil, and solid fuel appliances. Engineered to create seamless transitions between flue diameters, this high-quality connection component enhances the efficiency of your heating system, whether paired with a flue liner, chimney stack, or twin wall system. Read more...
EuroSW1 - Increaser - Ø 125-150mm - Ø 125-150mm
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At a Glance

  • Crafted from premium 316 grade stainless steel
  • Designed for gas, oil, and solid fuel appliances up to 600°C
  • Reliable friction fit joint for easy, secure connections
  • Continuous welded construction for enhanced durability
  • Complies with EN1856-2 standards for safety and performance

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The EuroSW1 Increaser (Ø 125-150mm) is engineered to suit gas, oil, and solid fuel appliances with temperatures reaching up to 600°C. Made from durable zero carbon steel, this single skin connecting flue pipe is perfect for linking your appliance to a Flue Liner, Chimney Stack, or Twin Wall Flue System. Note that it should not pass through ceilings or combustible walls, and must be at least 375mm away from combustible materials like wood or plasterboard during installation.

Featuring a friction fit joint, it ensures secure connections without the need for sealing—although adding fire cement or high-temperature silicone sealant can offer extra security. Designed for cutting, remember to coat any exposed steel with high-temperature paint to prevent rusting. Regular maintenance is essential, particularly for solid fuel applications, to ensure peak performance and safety.

SKU: 31-125-002

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We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Friday, November 14th. This is based on current lead times. Bear in mind that it is a busy time of year. If you need a product delivered by a specific time in the next 7 days, then please give us a call on 01670 206 999. Visit our Shipping Information page for more information.

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We began over 30 years ago as a fireplace shop in the North East. We now supply hundreds of trade professionals and thousands of retail customers, all across the UK, every month. We are still a family owned business, lead by the MD Neil, and always try our best to deliver the best possible experience. We also price match, so give us a call if you find this cheaper and want to buy from us. Visit our about us page to read a bit more.

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Technical Specifications
SKU31-125-002
Material316 grade stainless steel
Steel Thickness1mm
SeamContinuous Weld
Fuel CompatibilityWood, Oil, Gas, Low sulphur coal
ApprovalEN1856-2 T600 N1 Vm L50100 G375
Minimum Clearance To Combustible375mm
Max Operating Temperature600°C
Joint MethodFriction fit (sealant recommended optionally)
Warranty2 year manufacturing defect warranty
When installing the EuroSW1 Increaser, ensure that the smaller diameter end is positioned downward to efficiently drain any condensates. The unit must be installed at least 375mm away from any combustible material such as wood or plasterboard. It is important to note that this product should never pass through ceilings or combustible walls. Although the friction fit design typically does not require sealing, for additional security, consider applying fire cement or high-temperature silicone sealant at the joints. If the pipe needs to be cut, always apply a high-temperature paint to any newly exposed metal surfaces to prevent corrosion. Regular inspection and cleaning, particularly in solid fuel applications, are strongly recommended to ensure optimal performance and safety.

The EuroSW1 Increaser is suitable for gas, oil, and solid fuel appliances with temperatures up to 600°C.

No, EuroSW1 Increasers should not be used to pass through ceilings or combustible walls.

Ensure the Increaser is installed the correct way up, with the smaller diameter pointing downward to keep condensates within the flue system. It should also be at least 375mm away from combustible materials.

The EuroSW1 features a friction fit joint and typically does not require sealing. However, for extra security, fire cement or high-temperature silicone sealant can be used.

Yes, the EuroSW1 can be cut, but make sure to coat any exposed steel with high-temperature paint to prevent rusting.

Regular inspection and cleaning are crucial, especially for solid fuel applications. At least once a year is recommended.

Always wear appropriate PPE during installation and make sure the EuroSW1 Increaser is installed the correct way up, maintaining a safe distance from combustible materials.

 

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