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VIT-Smooth - 500mm 2 Part Adjustable Pipe - Ø 125mm (67-125-021)

Discover the exceptional quality of the VIT-Smooth 500mm 2 Part Adjustable Pipe from National Flues. This superior connecting pipe, ideal for gas, oil, and solid fuel appliances, combines innovative design with industry-standard materials. With its robust zero carbon steel construction and a sleek matt black powder enamel finish, this pipe is the perfect solution for connecting your flue liners, chimney stacks, or twin wall systems. Enhance your heating system with a reliable, easy-to-install, a Read more...
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At a Glance

    Crafted from zero carbon steel for durability
    Matt black powder enamel finish for heat resistance
    Adjustable 500mm 2-part design for flexible installation
    Includes a securing clamp for a tight, reliable connection
    Approved under EN1856-2 T600 N1 Vm L80120 G375 for safety
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, June 10th. This is based on current delivery times for this product. Delivery for products not in our warehouses can be delayed because of third party carriers. 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. 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.

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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:

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Have Questions?
Phone: 01670 206999
Email: [email protected]

The VIT-Smooth 500mm 2 Part Adjustable Pipe (Ø 125mm) is an essential component for connecting gas, oil, and solid fuel appliances to flue liners, chimney stacks, or twin wall flue systems. Crafted from zero carbon steel and finished with a durable matt black powder vitreous enamel coating, this pipe guarantees long-lasting performance at temperatures up to 600°C. Designed solely as a connecting pipe, VIT-Smooth should never be used to pass through ceilings or combustible walls.

It's crucial to install the pipe with the smaller diameter pointing downward to ensure condensates remain inside the flue system. The friction fit joint method requires no sealant, although for added security, fire cement or high-temperature silicone sealant can be used. If cut, the exposed steel must be treated with high-temperature paint to prevent rust.

Maintenance is straightforward, especially for solid fuel applications, where regular chimney sweeping is recommended.

SKU: 67-125-021

Technical Specifications
Length500mm adjustable to 920mm
MaterialZero Carbon Steel
Steel Thickness1.2mm
CoatingPowder Enamel
Coating Thickness0.2mm
ColourMatt Black
ApprovalEN1856-2 T600 N1 Vm L80120 G375
Distance To Combustible375mm
Diameter125mm
• The VIT-Smooth pipe must be installed with the smaller diameter end pointing downward to ensure condensates remain within the flue system. • It is designed solely as a connecting pipe and must not be used to pass through ceilings or combustible walls. • The friction-fit joint does not require sealant, however, for increased security you can use fire cement or a high-temperature silicone sealant at the joints. • If the pipe is cut to size, apply a high-temperature paint on the exposed steel to prevent corrosion. • Ensure that the pipe installation maintains a minimum distance of 375mm from any combustible material for safety compliance.

The VIT-Smooth pipe is suitable for gas, oil, and solid fuel appliances operating at temperatures up to 600°C.

No, the VIT-Smooth pipe is designed solely as a connecting pipe and should not be used to pass through ceilings or combustible walls.

The friction fit joint method of the VIT-Smooth pipe does not require sealing. However, for added security, you may use a jointing compound such as fire cement or high-temperature silicone sealant.

If the VIT-Smooth pipe is cut, you should cover any exposed steel with high-temperature paint to prevent rust over time.

The VIT-Smooth pipe should be installed with the smaller diameter pointing downward to keep condensates inside the flue system. It should also be at least 375mm away from any combustible material.

Regular maintenance involves ensuring provisions are made for inspecting and cleaning the chimney, especially for solid fuel applications. Chimneys should be swept at least once a year or as frequently as necessary.

The VIT-Smooth 500mm 2 Part Telescopic Pipe includes a securing clamp to fix the two parts together and guarantee a secure fit.

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