Product Description

125mm Vitreous Enamel Flue Pipe 500mm Long – 67-125-011

The 125mm Vitreous Enamel Flue Pipe 500mm Long provides a strong and neat connection between a compatible heating appliance and an approved chimney, flexible liner or twin-wall flue system.

This rigid VIT-Smooth pipe has an overall length of 500mm and an effective installed length of approximately 445mm. Therefore, remember to use the installed length when planning the complete flue route.

VIT-Smooth makes the pipe from strong 1.2mm zero-carbon steel. In addition, a matt-black vitreous enamel coating covers the internal and external surfaces to resist heat, combustion gases and normal corrosion.

Product Guide and Further Information

• Download the VIT-Smooth brochure

VIT-Smooth 125mm Flue Pipe Features

• Rigid 500mm fixed flue pipe
• Manufacturer part number: 67-125-011
• 125mm / 5-inch nominal diameter
• Overall length: 500mm
• Effective installed length: approximately 445mm
• Manufactured from 1.2mm zero-carbon steel
• Approximately 0.2mm vitreous enamel coating
• Approximate total thickness: 1.4mm to 1.5mm
• Internal and external enamel coating
• Smooth matt-black finish
• Friction-fit joint system
• Suitable for compatible wood-burning appliances
• Suitable for compatible multi-fuel appliances
• Suitable for compatible gas and oil appliances
• Maximum continuous temperature class: 600°C
• Minimum clearance from combustible materials: 375mm
• Manufactured to EN 1856-2
• Designed for visible connecting flue applications
• 12-year warranty, subject to the manufacturer’s terms

Technical Specification

• Brand: VIT-Smooth
• Manufacturer: MI-Flues
• Part number: 67-125-011
• Product type: Single-wall connecting flue pipe
• Nominal diameter: 125mm / 5 inches
• Overall length: 500mm
• Effective installed length: Approximately 445mm
• Material: Zero-carbon steel
• Steel thickness: 1.2mm
• Enamel thickness: Approximately 0.2mm
• Total coated thickness: Approximately 1.4mm to 1.5mm
• Finish: Matt-black vitreous enamel
• Joint type: Friction fit
• Temperature classification: T600
• Pressure class: N1
• Soot-fire resistance: G
• Minimum distance from combustibles: 375mm
• Product standard: EN 1856-2
• Full classification: T600 N1 Vm L80120 G375
• Approximate weight: 1kg
• GTIN / EAN: 5060795860383

What Does Effective Installed Length Mean?

The pipe measures 500mm from end to end. However, part of the pipe enters the next component when the installer joins the system.

As a result, the completed installation gains approximately 445mm of flue height from this section. Always use the effective installed length when calculating the required combination of pipes, bends and adaptors.

Why Choose VIT-Smooth?

VIT-Smooth uses carefully finished welds and a smooth enamel surface to create a neat appearance. Its deep matt-black colour also complements many traditional and modern stoves.

Furthermore, the 1.2mm steel construction creates a strong base beneath the vitreous enamel. The complete coated thickness measures approximately 1.4mm to 1.5mm.

The enamel covers both the internal and external surfaces. Therefore, it helps protect the steel against high temperatures, combustion gases and normal corrosion.

What Is This Flue Pipe Used For?

This pipe forms part of the visible connecting flue between a compatible appliance and an approved chimney system. For example, an installer may use it between a stove outlet and a flexible liner adaptor.

It may also connect to a compatible twin-wall chimney adaptor or suitable masonry chimney connection. However, every component must belong to an approved and compatible installation.

Suitable Appliances and Fuels

• Compatible wood-burning stoves
• Compatible multi-fuel stoves
• Suitable solid-fuel appliances
• Suitable gas appliances
• Suitable oil-fired appliances
• Domestic heating appliances with a compatible 125mm flue outlet

The appliance manufacturer must permit the proposed 125mm flue size. In addition, the complete chimney system must suit the appliance, fuel, heat output and flue-gas temperature.

Important Installation Restrictions

Do not use this single-wall stove pipe to pass through a wall, ceiling, roof, loft or concealed void. Instead, the installer must change to a suitable insulated chimney system before reaching these areas.

The pipe has a G375 classification. Therefore, it requires a minimum clearance of 375mm from combustible materials such as timber and some wall or ceiling finishes.

However, the appliance instructions may require a greater distance. If so, the installer must always follow the greater clearance.

Correct Installation Direction

The installer must fit the pipe with its smaller male end pointing downwards towards the appliance. This direction helps keep soot and condensate inside the flue system.

Before joining the sections, the installer must check that every component belongs to a compatible 125mm system. They should also follow the current VIT-Smooth instructions for the jointing method.

Does the Friction-Fit Joint Need Sealing?

The VIT-Smooth system uses friction-fit joints. However, fitting guidance can vary according to the component, appliance and complete installation.

For added security, the manufacturer may allow suitable fire cement or high-temperature sealant around some connections. Therefore, always follow the latest VIT-Smooth and appliance instructions rather than assuming every joint uses the same method.

Can the Pipe Be Cut to Length?

A competent installer may cut the plain end when the installation requires a shorter pipe. However, they must measure carefully because the cut section cannot be extended again.

After cutting, the installer should remove sharp edges and protect all exposed steel with suitable high-temperature paint. Otherwise, moisture may reach the uncoated steel and cause corrosion.

Cutting the pipe will change its installed length. Therefore, measure the complete flue route again before making the final cut.

Why Choose a Fixed Pipe?

A fixed pipe has fewer joints than an adjustable section. As a result, it can provide a simple and neat connection where the required measurement matches a standard length.

However, this model does not adjust. If the 445mm effective length does not suit the installation, the installer may need a shorter fixed pipe, an adjustable pipe or another approved component.

Inspection and Cleaning

The flue system must allow safe inspection and cleaning. Therefore, the installation may need an access-door component, particularly near bends or changes in direction.

Solid-fuel chimneys need regular sweeping to remove soot and deposits. The required frequency depends on the appliance, fuel and level of use. For this reason, follow the appliance instructions and use a competent chimney sweep.

Why Buy from SNH Tradecentre?

• Competitive prices: We aim to offer excellent value across our stove and flue range.
• Collection available: IN STOCK – Collect from our Birchington trade counter.
• Delivery options: We offer convenient delivery throughout eligible UK areas.
• Helpful advice: Our team can help you compare common flue sizes and pipe lengths.
• Clear product information: We provide useful measurements and installation details.
• Genuine products: Buy from an established plumbing and heating merchant.
• Trade and public welcome: We supply installers, businesses, landlords and homeowners.
• Independent merchant: SNH Tradecentre is based in Birchington, Kent.

Need Help Choosing a Flue Pipe?

Not sure whether this 500mm pipe suits your installation? Call SNH Tradecentre on 01843 842727. Please have the appliance make, model, outlet size and required installed length available.

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Installation Requirements

A competent installer should design and fit the complete flue system. For solid-fuel appliances, use a HETAS-registered installer or notify Local Authority Building Control where required.

The installer must follow the appliance instructions, flue manufacturer’s guidance and current Building Regulations. They must also check the chimney route, ventilation, clearances, supports, terminal and access for sweeping.

A carbon monoxide alarm must be installed where current regulations require one. However, an alarm does not replace correct installation, maintenance or chimney sweeping.

Frequently Asked Questions

What diameter is this flue pipe?

This pipe has a nominal diameter of 125mm, which is commonly described as a 5-inch stove pipe.

What is the overall length?

The pipe has an overall length of 500mm. However, the joint overlaps the next component during installation.

What is the effective installed length?

The effective installed length is approximately 445mm. Therefore, this is the figure to use when planning the completed flue height.

Can I use it with a wood-burning stove?

Yes, it can suit compatible wood-burning and multi-fuel appliances. However, the stove must permit a 125mm connecting flue and the complete installation must comply with current rules.

What is the maximum temperature rating?

The pipe has a T600 classification. Therefore, its maximum continuous operating temperature class is 600°C.

How far must it be from combustible materials?

The G375 classification requires a minimum clearance of 375mm. However, use any greater distance stated by the appliance or installation instructions.

Can this pipe pass through a wall or ceiling?

No. This single-wall pipe must not pass through walls, ceilings, roofs, lofts or concealed areas. A suitable approved chimney system must serve those parts of the installation.

Which way up should the pipe be installed?

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

Can the pipe be cut?

A competent installer can cut the plain end if required. However, they must remove sharp edges and protect exposed steel with suitable high-temperature paint.

Is this an adjustable flue pipe?

No. This is a rigid fixed-length pipe. Choose a suitable adjustable VIT-Smooth component if the installation requires variable length.

Who should install the flue pipe?

A competent installer should fit it as part of a correctly designed chimney system. For solid-fuel work, a HETAS-registered installer can complete and certify the installation where the scheme applies.

Order the 125mm VIT-Smooth 500mm Flue Pipe

Choose the 125mm VIT-Smooth Vitreous Enamel Flue Pipe 500mm Long 67-125-011 for a strong, neat and heat-resistant connection within a compatible stove or heating appliance installation.

Before ordering, confirm the appliance outlet diameter, required effective length and compatibility with every other component in the proposed flue system.

Manufacturers may update product specifications and installation guidance. Therefore, check the latest instructions and confirm suitability with a competent installer before ordering.