Gasket - Ø 125
At a Glance
- - Made with outer 304 and inner 316 stainless steel (0.40mm each) for lasting durability
- - Ideal for solid fuel, gas, and oil appliances including condensing systems
- - Includes high-density compressed rockwool insulation for energy efficiency
- - HETAS approved and CE marked for industry compliance
- - Secure fit with an integrated Locking Band for easy installation
- - Specific combustible clearance of 50mm (TWPro) and 60mm (KC) ensures safety

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 Gasket Ø 125 is an essential component for anyone using solid fuel, gas, or oil appliances, including wood stoves, gas coal effect fires, and boilers. Constructed with an outer skin of 304 grade stainless steel and an inner skin of 316 grade stainless steel, each 0.4mm thick, this gasket ensures durability and reliability. The insulation is crafted from compressed rockwool with a density of 200kg/m3 for TWPro and 128Kg/m3 for other models.
All parts are fully welded to maintain structural integrity. The required distance to combustibles is 50mm for TWPro and 60mm for KC. Approved by HETAS and CE marked, the Gasket Ø 125 offers trusted quality and compliance with industry standards.
Secure installation is guaranteed using a Locking Band, ensuring the gasket stays firmly in place. This gasket is specially designed to work seamlessly with condensing appliances, providing a robust seal and optimal performance.
SKU: 15-125-102
Technical Specifications | |
---|---|
SKU | 15-125-102 |
Dimensions | u00d8 125mm |
Outer Material | 304 Stainless Steel (0.40mm) |
Inner Material | 316 Stainless Steel (0.40mm) |
Insulation | Compressed Rockwool (200kg/mu00b3 TWPro, 128kg/mu00b3 other models) |
Approval | HETAS / CE |
Combustible Distance | 50mm for TWPro, 60mm for KC |
Compatible Fuels | Wood, Oil, Gas, Low Sulphur Coal |
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Thursday, April 3rd. 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
At National Flues, we are proud to offer the Gasket Ø 125 – a high-quality solution for sealing chimney flues in solid fuel, gas, and oil appliances. With our unbeatable prices and reliable nationwide delivery, this gasket is a top choice for both retail and trade customers.
The Gasket Ø 125 is designed to provide a secure and reliable seal for chimney flues in solid fuel, gas, and oil appliances, particularly in condensing systems.
National Flues is a leading supplier of fireplaces and flues in the UK, offering unbeatable prices and reliable nationwide delivery. We cater to both retail and trade customers with secure online payments and available trade accounts.
