Non-concentric increaser - Ø 700 (3-700-004)
At a Glance
- Made from premium 316L Stainless Steel
- CE marked and complies with EN 1856-1 standards
- Designed to increase flue diameter for improved performance
- Secure push-fit jointing system with Locking Band for simple installation
- Suitable for boilers, ovens, ventilation systems, and chimney liners
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Thursday, August 14th. This is based on current lead times for this product. If you need a stove, or other bulky product, to be delivered by a specific time in the next 7 days, then please give us a call on 01670 206 999. 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 and you can read in our blog about they types and terms and conditions for warranties. Mi-Flex flue liner, for example, comes with a lifetime guarantee. Give us a call if you want to know about a specific warranty. Returns for damaged items are covered by insurance; non-damaged returns incur return delivery costs.
Best 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.
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]
- Summary
- Specs
- Install
- FAQs
The Non-concentric increaser - Ø 700 is a highly efficient modular component from the SWPro range by National Flues. This single wall flue system is crafted from 316 grade stainless steel, ensuring durability and resistance to corrosion. Designed for both high and low-temperature applications, this increaser operates seamlessly in non-condensing and condensing environments under positive and negative pressure.
The SWPro system is CE marked and meets the EN 1856-1 standards, ensuring reliability and safety. Installation is a breeze thanks to its push-fit jointing system, which is securely fastened with a Locking Band. For P1 and H1 installations, jointing gaskets must be used at every joint to ensure a perfect seal.
Remember, maintaining a 50mm distance from any combustible materials is crucial for safe operation. Whether you need to use it in boilers, ovens, ventilation systems, or as a chimney shaft liner, this increaser ensures efficiency and longevity.
SKU: 3-700-004
| Technical Specifications | |
|---|---|
| SKU | 3-700-004 |
| Diameter | Ø 700 |
| Material | 316L Stainless Steel |
| Compliance | CE, EN 1856-1 |
| System | SWPro |
| Temperature Range | High & Low |
| Installation | Push-fit jointing with Locking Band and required gaskets |
| Warranty | 10 Years |
| Fuel Compatibility | Gas, Oil |
| Clearance | 50mm distance to combustibles |
What our experts say!
"The Non-Concentric Increaser - Ø 700 stands out as a reliable and versatile choice for any commercial or residential flue system. Crafted from high-grade 316L Stainless Steel, it guarantees long-lasting performance. At National Flues, we pride ourselves on delivering quality products nationwide at competitive prices, catering to both retail and trade customers."
The Non-Concentric Increaser - Ø 700 is used to expand the diameter of a flue system while preventing condensate pooling, ensuring smoother and more efficient operation.
National Flues is a trusted supplier of high-quality fireplaces and flues, catering to both retail and trade customers across the UK. Known for competitive pricing and reliable delivery, we are committed to providing exceptional products and services nationwide.
