VIT-Smooth - Increaser - Ø 125-150mm
At a Glance
- Crafted from zero carbon steel for maximum durability
- Finished in sleek, matt black powder enamel
- Suitable for gas, oil, and solid fuel appliance installations
- Withstands temperatures up to 600°C
- Provides a secure, friction-fit joint for simple installation

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 VIT-Smooth Increaser - Ø 125-150mm is the perfect solution for adapting your VIT-Smooth flue system. Specifically designed for connecting your appliance to a flue liner, chimney stack, or twin wall flue system, this increaser is capable of handling gas, oil, and solid fuel appliances with temperatures up to 600°C. Fabricated from zero carbon steel and coated with a durable powder vitreous enamel in a sleek matt black finish, the VIT-Smooth Increaser ensures both strength and style.When installing, ensure that the smaller diameter points downward to keep condensates within the flue system, preventing any external damage or aesthetic degradation.
The VIT-Smooth system uses a friction fit joint that doesn't require sealing; however, for extra security, you may apply jointing compound such as fire cement or high-temperature silicone sealant. Note that the VIT-Smooth pipe should not be used to pass through ceilings or combustible walls and must be installed at least 375mm away from any combustible materials. Proper PPE should be worn during installation for safety.For solid fuel applications, regular chimney inspection and cleaning are crucial.
Adding an access door at directional changes will facilitate maintenance tasks. We recommend that chimneys serving solid fuel appliances be swept at least once a year.
SKU: 67-125-002
Technical Specifications | |
---|---|
SKU | 67-125-002 |
Material | Zero Carbon Steel |
Steel Thickness | 1.2mm |
Coating | Powder Enamel |
Coating Thickness | 0.2mm |
Colour | Black |
Approval | EN1856-2 T600 N1 Vm L80120 G375 |
Distance To Combustible | 375mm |
Diameter | 125-150mm |
Operating Temperature | Up to 600°C |
Fuel Types Supported | Gas, Oil, Solid Fuel |
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
The VIT-Smooth Increaser is a top-notch choice for enhancing your flue system. Reliable and versatile, it's suitable for a variety of fuel types and can withstand temperatures up to 600°C. As always, National Flues offers unbeatable prices and reliable nationwide delivery, servicing both retail and trade customers with secure online payments.
The VIT-Smooth Increaser is designed to adapt your flue system from one diameter to a larger one, ensuring a seamless connection between your appliance and the flue system.
National Flues is a leading supplier of fireplaces and flues, known for unbeatable prices, reliable delivery, and excellent service to both retail and trade customers nationwide.
