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Wall Sleeve - Ø 125 (15-125-098)

National Flues brings you the Wall Sleeve - Ø 125mm, a premium accessory designed to protect your chimney flue system as it passes through exterior walls. This robust wall sleeve is ideal for installations involving wood burning stoves, oil boilers, gas heaters and low sulphur coal systems, ensuring safety, durability and compliance with industry standards. Read more...
Wall Sleeve - Ø 125
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Now only £29.99
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At a Glance

  • Durable 304/316 stainless steel construction
  • Suitable for wood, oil, gas, and low sulphur coal appliances
  • Easy to install with tapering option for 45° wall passages
  • Fully welded design for robust protection
  • HETAS Approved and CE marked

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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Phone: 01670 206999
Email: sales@nationalflues.com

The Wall Sleeve - Ø 125mm is designed to protect your chimney system when passing through an exterior wall. Primarily used with solid fuel and gas/oil appliances such as wood stoves, gas-coal effect fires, and oil and gas boilers, this sleeve ensures durability and safety. Constructed with an outer skin of 304 grade stainless steel and an inner skin of 316 grade stainless steel, both at 0.4mm thick, it offers robust protection.

The insulation is made from compressed Rockwool, offering densities of 200kg/m3 TWPro and 128Kg/m3. All parts are fully welded, providing a seamless and sturdy finish. The distance to combustibles is 50mm for TWPro and 60mm on KC.

TWPro is HETAS Approved and CE marked, ensuring compliance with industry standards. Installation is straightforward, and the sleeve can be tapered for a flush fit when passing through walls at a 45-degree angle, easily cut using a grinder or hacksaw.

SKU: 15-125-098

Delivery Information* +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Monday, November 17th. 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.

About National Flues Ltd +

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
SKU15-125-098
DimensionsØ 125mm
Outer Material304 Stainless Steel (0.4mm thick)
Inner Material316 Stainless Steel (0.4mm thick)
InsulationCompressed Rockwool (200kg/m3 TWPro / 128kg/m3 KC)
Applicable ForWood, Oil, Gas, Low sulphur coal
CertificationsHETAS Approved, CE Marked
Distance To CombustiblesTWPro 50mm, KC 60mm
InstallationTaper-cuttable for 45° wall passage
Installation is straightforward: Start by positioning the sleeve in accordance with manufacturer instructions. Ensure that when passing through an exterior wall, the gap between the flue pipe and the wall is completely filled with properly compressed Rockwool insulation. For walls that meet at a 45-degree angle, use a grinder or hacksaw to taper the sleeve, securing a flush fit. Always maintain the minimum clearance distances – 50mm for TWPro systems and 60mm for KC systems – to ensure safety around combustibles. Check that all components are fully welded and aligned before completing the installation. If in doubt, refer to the detailed installation guide or consult a qualified professional.

It is suitable for solid fuel and gas/oil appliances, including wood stoves, gas-coal effect fires, and oil and gas boilers.

The Wall Sleeve features an outer skin made from 304 grade stainless steel and an inner skin from 316 grade stainless steel, both 0.4mm thick.

The insulation is made from compressed Rockwool, with densities of 200kg/m3 TWPro and 128Kg/m3.

Installation involves securing TWPro Twin Wall Insulated Chimney parts with a Locking Band and ensuring the required distance from combustibles. The sleeve can be cut to fit using a grinder or hacksaw if passing through walls at a 45-degree angle.

Yes, TWPro is HETAS Approved and CE marked, complying with industry standards.

The distance to combustibles is 50mm for TWPro and 60mm for KC.

Yes, if the flue system goes through the wall at a 45-degree angle, the sleeve needs to be taper-cut to fit flush in the wall.

 

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