Product Description

150mm Adjustable Vitreous Enamel Flue Pipe – 500mm

Model: 67-150-020

Achieve the correct finished height in your stove installation with the VIT-Smooth 150mm One-Part Adjustable Flue Pipe. The component measures approximately 500mm overall and provides a usable length of up to approximately 400mm, depending on the joint overlap.

The adjustable section slides into the female end of a compatible existing pipe or fitting. Therefore, you can shorten the installed length without cutting a standard enamelled pipe.

In addition, the product includes a clamp to secure the adjustable connection. Its smooth matt-black finish also complements both modern and traditional UK stoves.

At a Glance

• 150mm (6-inch) one-part adjustable flue pipe
• Approximately 500mm overall component length
• Up to approximately 400mm usable length
• Slides into a compatible female pipe or fitting
• Supplied with a securing clamp
• Helps achieve an accurate finished flue height
• Made from 1.2mm zero-carbon steel
• Internal and external vitreous enamel coating
• Approximately 1.4mm total finished thickness
• Smooth matt-black finish
• Suitable for compatible gas, oil and solid-fuel appliances
• Temperature classification: T600
• Declared clearance to combustible materials: 450mm
• Model: 67-150-020
• EAN: 5060795860185

Key Features and Benefits

• Adjustable installed length: Helps close a variable gap in the connecting flue.
• 500mm overall length: Provides up to approximately 400mm of usable length.
• One-part construction: Creates a simpler installation than a two-part adjustable pipe.
• Sliding connection: Fits inside the female end of a compatible component.
• Supplied clamp: Helps secure the pipe after adjustment.
• 150mm diameter: Suits compatible 6-inch VIT-Smooth components.
• Strong construction: Uses 1.2mm zero-carbon steel for durability.
• Internal enamel coating: Helps resist heat and combustion deposits.
• External enamel coating: Creates a neat and easy-to-clean surface.
• T600 classification: Suits compatible high-temperature stove installations.

What Is a One-Part Adjustable Flue Pipe?

A one-part adjustable pipe helps bridge a gap where a standard fixed-length pipe does not fit. Its reduced-diameter section slides inside the female end of a compatible pipe or fitting.

You can then move the pipe up or down until the flue reaches the required installed height. Finally, use the supplied clamp to secure the connection according to the manufacturer’s instructions.

This design can reduce the need to cut a fixed enamelled pipe. As a result, it helps preserve the factory finish while making installation measurements more flexible.

Overall Length and Usable Length

Measurement	Approximate Length
Overall component length	500mm
Maximum usable length	Up to approximately 400mm
Adjustment method	Slides into a compatible female connection

The final installed length depends on how far the adjustable section enters the adjoining component. Therefore, measure the required gap and allow enough overlap to create a stable connection.

Do not extend the pipe beyond the manufacturer’s permitted limit. Insufficient overlap may weaken the joint and make the connection unsafe.

When Should You Use an Adjustable Flue Pipe?

An adjustable pipe works well when standard fixed lengths do not match the available space. For example, you may need it between a stove and a register plate or between a fixed pipe and a chimney adaptor.

It can also help when the exact installed distance differs slightly from the original calculation. Therefore, it gives the installer more flexibility during final assembly.

However, this product only adjusts the length of a straight flue section. It does not correct sideways misalignment. For a lateral change in position, use suitable elbows or an offset component.

Why Choose VIT-Smooth?

VIT-Smooth provides a high-quality alternative to basic welded black stove pipe. The manufacturing process creates neat welds and a smooth, consistent finish. Consequently, the completed installation looks clean and professional.

The manufacturer forms the pipe from 1.2mm zero-carbon steel. It then adds approximately 0.2mm of powder vitreous enamel. Together, the steel and enamel create a total finished thickness of approximately 1.4mm.

Furthermore, VIT-Smooth coats both the inside and outside of the component. The internal enamel helps resist heat and corrosive combustion products. Meanwhile, the external enamel creates a deep matt-black finish that matches most UK stoves.

VIT-Smooth Adjustable Pipe Specification

• Product type: one-part adjustable connecting flue pipe
• Model/SKU: 67-150-020
• EAN: 5060795860185
• Nominal internal diameter: 150mm (6 inches)
• Overall component length: approximately 500mm
• Maximum usable length: up to approximately 400mm
• Adjustment method: slides into a compatible female connection
• Securing method: supplied clamp
• Material: zero-carbon steel
• Steel thickness: 1.2mm
• Coating: powder vitreous enamel
• Approximate enamel thickness: 0.2mm
• Approximate total finished thickness: 1.4mm
• Coating position: internal and external
• Colour: black
• Finish: smooth matt black
• Fuel compatibility: gas, oil and solid fuel
• Temperature classification: T600
• Classification: EN 1856-2 T600 N1 Vm L80120 G450
• Declared minimum distance to combustible materials: 450mm
• Manufacturer warranty: 12 years, subject to its terms

Suitable Appliances and Flue Systems

You can use this pipe with compatible gas, oil and solid-fuel appliances. These may include wood-burning stoves, multifuel stoves and other domestic heating appliances.

However, always check the appliance instructions before ordering. The manufacturer will state the required flue diameter, temperature classification and permitted installation arrangement.

This adjustable pipe can form part of a route leading to:

• A suitable masonry chimney
• An approved flexible chimney liner
• A compatible chimney or liner adaptor
• An insulated twin-wall flue system
• Matching 150mm VIT-Smooth pipes and fittings

Application

This 150mm adjustable pipe forms part of a visible single-wall connecting flue. It helps achieve the required distance between a compatible appliance and the main chimney system.

The product carries a T600 temperature classification. Therefore, it has a nominal maximum continuous flue-gas temperature classification of 600°C.

Never use single-wall vitreous enamel stove pipe to pass through walls, ceilings, floors, roofs, cupboards or concealed spaces. Instead, use a suitable tested and insulated chimney system wherever the flue passes through the building structure.

How to Install the Adjustable Pipe

First, measure the gap that the adjustable pipe needs to cover. Next, insert the adjustable end into the female end of the compatible pipe or fitting.

Then move the pipe until it reaches the required installed length. Keep enough overlap inside the adjoining component to form a strong and stable connection.

Finally, fit and tighten the supplied clamp according to the manufacturer’s instructions. Also, support the complete flue route so that it does not place excessive weight on the adjustable joint or appliance outlet.

Correct Installation Direction

Install the connecting flue with the male or smaller-diameter ends pointing downwards towards the appliance. The female ends should face upwards towards the chimney.

This direction keeps condensates and combustion deposits inside the flue. As a result, they can travel back towards the appliance instead of leaking onto the outside of a joint.

However, the sliding adjustable section must enter the correct compatible female connection. Therefore, check the component layout before beginning installation.

Using the Supplied Clamp

The clamp helps secure the adjustable section after you set the required length. Position it as the manufacturer directs and make sure it grips the correct part of the connection.

Do not use the clamp to compensate for a loose, damaged or incompatible joint. Instead, confirm that both components match and that the pipe has enough overlap.

In addition, inspect the clamp during routine maintenance. Replace it if it becomes damaged, loose or badly corroded.

Jointing and Sealing

Matching VIT-Smooth components use friction-fit joints. Therefore, they do not normally require fire clay.

However, adjustable joints may need a specific sealing method because one section slides inside another. Follow the current VIT-Smooth instructions and the appliance manufacturer’s guidance.

If the instructions require a jointing compound, use only a suitable fire cement or high-temperature silicone sealant approved for flue applications. Never use ordinary household silicone.

Can the Adjustable Pipe Be Cut?

The manufacturer allows the pipe to be cut, but avoiding alteration will help preserve the vitreous enamel coating. Therefore, adjust the sliding section first and only consider cutting when the available range cannot provide the required length.

Cutting can chip the enamel and expose the steel underneath. It may also affect the connection profile or the amount of safe overlap.

If cutting proves necessary, protect every exposed steel edge with suitable high-temperature paint. In addition, remove any sharp edges and confirm that the modified pipe still forms a secure connection.

Clearance from Combustible Materials

This pipe has a declared minimum distance of 450mm from combustible materials. Combustible materials may include timber, furniture, curtains and heat-sensitive building products.

In addition, do not automatically treat plasterboard as non-combustible. It may cover timber studs or form part of a combustible wall structure.

The appliance or another flue component may require a greater clearance. If the requirements differ, always follow the greatest stated distance.

Sweeping and Inspection Access

This adjustable pipe does not include a built-in access door. Therefore, make sure the complete flue route provides suitable access for inspection and sweeping.

For example, you may need a pipe with a door, a doored elbow or an inspection tee elsewhere in the system.

Discuss the sweeping route with the installer before completing the installation. This will help ensure that a chimney sweep can reach every section safely.

Installation Safety

Before installation, confirm that the 150mm diameter matches the appliance and every adjoining component. Also, check that the available adjustment range suits the required gap.

Do not extend the sliding section beyond its safe limit. Furthermore, do not rely on the clamp alone if the joint lacks enough overlap.

The installation must comply with the appliance instructions, current Building Regulations and all relevant standards. Therefore, we recommend using a suitably competent installer, such as a HETAS-registered installer where appropriate.

Inspection and Maintenance

Check the adjustable joint, clamp and surrounding pipework regularly. Look for movement, damaged enamel, staining, corrosion or signs of leakage.

In addition, arrange regular chimney sweeping. The correct schedule will depend on the appliance, fuel and frequency of use.

Only clean the external enamel after the pipe has cooled completely. Use a soft, dry or slightly damp cloth. Avoid abrasive pads and harsh chemicals because they may damage the matt-black finish.

Finally, replace the component if it becomes badly damaged, distorted, corroded or insecure.

Product Guides and Matching Components

• Download the VIT-Smooth brochure
• Discover why we rate VIT-Smooth stove flue pipe
• View matching 150mm vitreous enamel flue components

Why Buy from SNH Tradecentre?

• Specialist stove, chimney and flue-system supplier
• Extensive range of matching 150mm VIT-Smooth components
• Practical product advice from an experienced team
• Nationwide UK delivery options
• Secure online ordering
• Trade counter in Birchington, Kent
• Support before and after your purchase

Need help checking whether the adjustment range will cover your installation gap? Call the SNH Tradecentre team on 01843 842727 before ordering.

You can also read SNH Tradecentre customer reviews on Google.

Frequently Asked Questions

Is this pipe 330mm or 500mm long?

Model 67-150-020 has an overall length of approximately 500mm. The previous 330mm title conflicts with the current product specification and should not be used.

What is the usable length?

The manufacturer states a usable length of up to approximately 400mm. However, the final length will depend on the required joint overlap.

How does the pipe adjust?

The adjustable section slides into the female end of a compatible pipe or fitting. You can then position it at the required length and secure the connection with the supplied clamp.

Does the pipe include a clamp?

Yes. The component comes with a clamp to help secure the adjustable connection.

What diameter is the pipe?

It has a nominal internal diameter of 150mm, which equals approximately 6 inches.

Can I use it with a wood-burning stove?

Yes, it suits compatible solid-fuel appliances, including many wood-burning and multifuel stoves. However, the appliance must require a 150mm flue connection.

Can I cut the adjustable pipe?

Yes, although you should avoid cutting where possible. If you cut it, protect every exposed steel edge with suitable high-temperature paint.

Does it need fire clay?

No. Matching VIT-Smooth components use friction-fit joints, so fire clay is not normally required. However, follow the current installation instructions for sealing the sliding adjustable joint.

Can the pipe pass through a wall or ceiling?

No. This is a single-wall connecting pipe. It must not pass through walls, ceilings, floors, roofs or concealed spaces. Use a suitable insulated chimney system for building penetrations.

How far must it remain from combustible materials?

The declared minimum clearance is 450mm. However, follow a greater distance if the appliance or another flue component requires one.

Does this pipe include a sweeping door?

No. Provide suitable inspection and sweeping access elsewhere in the complete flue system.

What does T600 mean?

T600 means the pipe has a nominal maximum continuous flue-gas temperature classification of 600°C.

What warranty does it include?

The manufacturer lists a 12-year warranty. However, its installation, use and maintenance conditions will apply.