Increaser 3 diameters - Ø 650
At a Glance
- Constructed from high-grade 316L stainless steel
- Suitable for both condensing and non-condensing systems
- Complies with EN 1856-1 and is CE marked
- Versatile design for transitioning between multiple flue diameters
- Push-fit jointing system with locking band for secure installation

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 Increaser 3 diameters - Ø 650 is an essential component of the SWPro modular single-wall flue system, designed to handle various commercial applications. Crafted from high-grade 316L stainless steel, it ensures durability and resilience, accommodating both high and low-temperature scenarios, whether condensing or non-condensing. The flue system meets stringent EU standards, being CE marked, and adheres to EN 1856-1 designations, ensuring product reliability and safety.
The system incorporates a high-pressure sealing gasket P1/H1 for optimal performance in positive and negative pressure setups. Ideal for boilers, ovens, ventilation systems, and chimney shaft liners, this increaser makes transitioning between different flue diameters a seamless process. Installation is user-friendly with a push-fit jointing system, fortified by a locking band, and requires maintaining a 50mm clearance from combustible materials.
SKU: 3-650-202
Technical Specifications | |
---|---|
SKU | 3-650-202 |
Material | 316L Stainless Steel |
System | SWPro Modular Single-Wall Flue |
Approvals | CE, EN 1856-1 |
Pressure Compatibility | Positive and Negative |
Installation | Push-fit jointing system with locking band |
Clearance Requirement | 50mm from combustible materials |
Fuel Compatibility | Gas, Oil |
Warranty | 10 Years |
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, April 29th. 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 Increaser 3 Diameters - Ø 650 receives a strong recommendation from National Flues. High-quality materials and design make it a versatile choice for commercial flue applications. Plus, enjoy our reliable nationwide delivery and top-notch service for both retail and trade customers.
The Increaser 3 Diameters - Ø 650 is used to transition between different flue diameters in commercial flue systems, ensuring compatibility and efficiency.
National Flues is a leading supplier of high-quality fireplaces and flues in the UK, offering competitive prices, reliable delivery, and excellent service to both retail and trade customers nationwide.
