Ventilated Firestop Support Kit (WHITE) - Ø 125
At a Glance
- HETAS approved & CE marked for trusted safety compliance
- Dual stainless steel construction (304 outer & 316 inner, 0.4mm thick) for superior durability
- Efficient design ensuring a safe 50mm distance from combustible materials
- Supports up to 3 metres vertical installation for versatile chimney setups
- Ideal for various fuel appliances, including wood, oil, and gas systems

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 Ventilated Firestop Support Kit (WHITE) - Ø 125 is engineered to provide robust support and ventilation for your chimney flue system. Ideal for use on solid fuel and gas/oil appliances such as woodstoves, gas coal effect fires, oil and gas boilers, and various solid fuel devices. This kit integrates seamlessly with TWPro Twin Wall Insulated Chimney systems, renowned for their quality and durability.Constructed with 304 grade stainless steel for the outer skin and 316 grade stainless steel for the inner skin, both at a thickness of 0.4mm, the kit is built to last.
The inner insulation consists of compressed rockwool, offering a density of 200kg/m3, ensuring effective thermal protection. Fully welded parts guarantee structural integrity. The recommended distance to combustibles is 50mm, ensuring safety and compliance with regulations.TWPro is HETAS approved and CE marked, boasting designations EN1856-1 T600 N1 W V2 L50040 G50 and EN1856-1 T200 W V2 L50040 O20.
Installation is straightforward, utilizing a securing Locking Band to connect chimney parts. It’s crucial to maintain a 50mm distance from the flue's exterior to any combustible materials like wood or plasterboard.
SKU: 2-125-077
Technical Specifications | |
---|---|
SKU | 2-125-077 |
Product Name | Ventilated Firestop Support Kit (WHITE) - u00d8 125 |
Outer Material | 304 Stainless Steel (0.4mm thick) |
Inner Material | 316 Stainless Steel (0.4mm thick) |
Insulation | Compressed rockwool, 200kg/mu00b3 |
Approvals | HETAS / CE |
Designations | EN1856-1 T600 N1 W V2 L50040 G50, EN1856-1 T200 W V2 L50040 O20 |
Distance To Combustibles | 50mm |
Vertical Support | Up to 3 metres |
System Compatibility | TWPro Twin Wall Insulated Chimney |
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, April 8th. 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 Ventilated Firestop Support Kit (WHITE) - Ø 125 is an excellent choice for anyone in need of a robust and reliable firestop solution. With HETAS approval and CE marking, this kit ensures the utmost safety and performance. We are proud to offer this top-tier product with reliable nationwide delivery to both retail and trade customers.
The Ventilated Firestop Support Kit is designed to provide effective support and ventilation in chimney flue systems for various fuel appliances.
TWPro is a leading manufacturer of twin wall insulated chimney systems, renowned for their high-quality construction and safety standards. Their products are HETAS approved and CE marked, guaranteeing top performance and reliability.
