Product Description

125mm VIT-Smooth Vitreous Enamel Flue Pipe – 1000mm

Model: 67-125-010

The 125mm VIT-Smooth vitreous enamel flue pipe is a rigid, fixed 1000mm single-wall connecting pipe. Once fully joined to a compatible component, it provides an effective installed length of approximately 945mm.

Made from 1.2mm zero-carbon steel, the pipe has a vitreous enamel coating on its internal and external surfaces. Therefore, it provides a strong, heat-resistant connection with a smooth matt black finish that complements many wood-burning and multifuel stoves.

This fixed length suits installations that require a long, straight section between a compatible appliance and the chimney connection. However, installers should calculate the required length using the 945mm effective installed measurement rather than the full 1000mm product length.

125mm VIT-Smooth 1000mm Flue Pipe Features

• 125mm (5-inch) nominal flue diameter
• 1000mm overall product length
• Approximately 945mm effective installed length
• Rigid, fixed-length construction
• Manufacturer model number: 67-125-010
• Designed for compatible VIT-Smooth connecting flues
• Made from 1.2mm zero-carbon steel
• Approximately 0.2mm vitreous enamel coating
• Approximately 1.4mm total thickness, including enamel
• Internal and external vitreous enamel finish
• Heat-resistant matt black colour
• Friction-fit connection
• Suitable for compatible gas, oil and solid-fuel appliances
• Maximum continuous operating temperature: 600°C
• Product designation: EN 1856-2 T600 N1 Vm L80120 G375
• Minimum declared distance from combustible materials: 375mm
• Manufactured in the UK
• 12-year warranty, subject to the manufacturer’s terms

Technical Specification

• Product type: Fixed single-wall connecting flue pipe
• Nominal diameter: 125mm (5 inches)
• Overall length: 1000mm
• Effective installed length: Approximately 945mm
• Material: Zero-carbon steel
• Steel thickness: 1.2mm
• Enamel thickness: Approximately 0.2mm
• Total thickness: Approximately 1.4mm
• Coating: Internal and external vitreous enamel
• Colour: Matt black
• Joint type: Friction fit
• Temperature classification: T600
• Product standard: EN 1856-2
• Distance from combustibles: 375mm
• Warranty: 12 years, subject to terms
• EAN: 5060795860017
• Model: 67-125-010

Overall Length Versus Installed Length

The pipe measures 1000mm from end to end before installation. However, part of the pipe enters the adjoining component when the joint is assembled. Consequently, the effective length added to the completed flue route is approximately 945mm.

Always use the effective installed length when measuring the space between the appliance and chimney connection. Failing to allow for the joint overlap may make the assembled pipe run shorter than expected.

What Is This Flue Pipe Used For?

This product forms a straight section of visible connecting flue between a compatible heating appliance and a suitable chimney system. Depending on the approved design, the upper connection may lead towards a flexible chimney liner, masonry chimney or insulated twin-wall system.

The pipe may suit compatible wood-burning, multifuel, gas and oil appliances. However, the appliance manufacturer must permit the 125mm diameter and single-wall connecting-pipe arrangement.

Why Choose VIT-Smooth?

VIT-Smooth combines strong steel construction with a carefully finished vitreous enamel surface. Its discreet weld and smooth matt black finish create a clean appearance in both traditional and contemporary stove installations.

Furthermore, the internal and external enamel coating helps protect the steel against heat, combustion gases and corrosive deposits. The friction-fit design also allows the pipe to connect neatly to compatible VIT-Smooth components.

Suitable Applications

• Compatible wood-burning stoves
• Compatible multifuel stoves
• Suitable gas heating appliances
• Suitable oil-fired appliances
• 125mm VIT-Smooth connecting-flue systems
• Visible straight sections of single-wall stove pipe
• Connections leading towards a suitable chimney liner
• Connections leading towards a suitable masonry or twin-wall chimney system

Measuring Before Ordering

Measure the required pipe run from the relevant appliance connection to the next compatible component. Then allow for the effective installed length, joint overlap, any required adaptor and the dimensions of bends or access components.

This fixed pipe provides approximately 945mm of installed length. Therefore, it may not suit an opening that requires exactly one metre of additional height after assembly.

If the available distance does not match a fixed pipe length, the installer may need a shorter fixed section, an approved adjustable component or a correctly cut pipe. Confirm the proposed method before altering the product.

Can the Pipe Be Cut?

A competent installer may cut the pipe when the system design permits it. However, the correct end and joint arrangement must remain available after cutting.

Any exposed steel at the cut edge should receive suitable high-temperature protective paint because uncoated steel may rust. The installer should also remove sharp edges and ensure the pipe remains round, undamaged and compatible with the adjoining component.

Measure carefully before cutting because an incorrectly shortened pipe cannot normally be restored to its original length.

Installation Direction

Install the pipe with the smaller or male end pointing downwards towards the appliance. This arrangement keeps condensate and combustion deposits within the flue system rather than allowing them to escape around the outside of a joint.

Ensure each connection engages fully and remains mechanically secure. Do not install the pipe upside down, and do not use jointing materials to compensate for damaged or incompatible components.

Installation and Safety Information

Use VIT-Smooth only as a single-wall connecting flue between a compatible appliance and a suitable chimney, flexible liner or insulated twin-wall system. Never use this pipe to pass through a wall, ceiling, roof or concealed void.

Maintain at least the declared 375mm distance from combustible materials. These may include timber, furniture, plasterboard containing combustible material and combustible wall finishes. Follow any greater clearance stated by the appliance manufacturer.

The friction-fit joint does not normally require fire cement between correctly matched VIT-Smooth components. However, the installer must follow the latest manufacturer guidance for securing and sealing the complete system.

A competent installer should design and fit the complete flue. For solid-fuel work, use a suitably qualified installer, such as a HETAS-registered installer, or notify Building Control where required.

Finally, follow the appliance instructions, current VIT-Smooth guidance and applicable Building Regulations. The appliance manufacturer’s instructions determine the required pipe diameter, permitted route and connection method.

Supporting the Flue Pipe

The completed connecting flue must remain stable and correctly aligned. Do not allow the full weight of the chimney or flexible liner to rest on this pipe or the appliance outlet.

Use suitable system components and supports where required. The joints must not carry excessive sideways loading, and the installation should not place damaging stress on the stove spigot.

Inspection and Maintenance

The chimney system must provide suitable access for inspection and sweeping. Access becomes particularly important near bends, changes of direction and transitions into another chimney system.

A competent person should inspect and clean the chimney regularly. The appropriate frequency depends on the appliance, fuel, level of use and chimney condition.

Use suitable sweeping equipment that will not damage the vitreous enamel surface. Replace any component that shows significant corrosion, enamel damage, distortion or insecure joints.

Product Guide

• Download the VIT-Smooth brochure

Why Buy from SNH Tradecentre?

• Competitive prices: We aim to offer excellent value across our flue and chimney range.
• Helpful advice: Our team can help you compare fixed pipe lengths, bends and adaptors.
• Genuine products: Order from an established plumbing and heating merchant.
• Collection available: Collect eligible in-stock products from our Birchington trade counter.
• UK delivery: Choose from the available delivery services at checkout.
• Trade and public welcome: We supply installers, homeowners, landlords and property professionals.

Need help choosing the correct flue-pipe length? Call SNH Tradecentre on 01843 842727 before ordering. If possible, have the appliance model, flue diameter and required installed measurement ready.

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Frequently Asked Questions

What diameter is this VIT-Smooth flue pipe?

It has a nominal diameter of 125mm, equivalent to approximately five inches. It is designed to connect to compatible 125mm VIT-Smooth components.

Is the pipe exactly 1000mm long?

Its overall product length is 1000mm. However, the assembled joint uses part of that length, so it adds approximately 945mm to the installed flue route.

Why is the effective installed length only 945mm?

Approximately 55mm enters the adjoining component when the connection is fully assembled. Therefore, the visible or effective length added to the system is shorter than the overall measurement.

Can I connect this pipe directly to every 125mm stove?

Not necessarily. Appliance spigots can use different dimensions and joint arrangements. A suitable stove adaptor may be required, so ask the installer to check the connection before ordering.

Can I use this pipe with a wood-burning stove?

It may suit a compatible wood-burning or multifuel stove. However, the appliance manufacturer must permit the 125mm flue diameter and single-wall connecting-pipe arrangement.

Can the 1000mm pipe be shortened?

It may be possible for a competent installer to cut the pipe when the system design permits it. Any exposed steel must receive suitable protection, and the remaining section must retain the correct connection arrangement.

Which way up should the pipe be installed?

The smaller or male end should point downwards towards the appliance. This helps keep condensate and deposits inside the flue system.

What is the maximum operating temperature?

The VIT-Smooth system carries a T600 classification. Therefore, its maximum continuous operating temperature is 600°C. Always observe any lower limit specified by the appliance manufacturer.

Can the pipe pass through a wall or ceiling?

No. This is a single-wall connecting-flue pipe. It must not pass through walls, ceilings, roofs or concealed spaces. These locations normally require a suitable insulated chimney system.

How far must it be from combustible materials?

The product designation declares a minimum distance of 375mm from combustible materials. However, the installer must assess the complete installation and observe any greater clearance required by the appliance manufacturer.

Does the joint need fire cement?

The product uses a friction-fit connection, so fire cement is not normally required between correctly matched VIT-Smooth parts. Nevertheless, follow the latest manufacturer instructions for the complete installation.

Who should install this stove pipe?

A competent installer should fit it as part of a correctly designed chimney system. For solid-fuel installations, consider using a HETAS-registered installer or arranging Building Control notification where required.

Manufacturers may update specifications, installation guidance and warranty terms. Therefore, check the latest VIT-Smooth literature and confirm the required installed length before ordering.