Product Description

150mm One Piece Offset with Door – Vitreous Enamel

Model: 67-150-046

Create a neat change in your stove flue route while maintaining easy sweeping access with the VIT-Smooth 150mm One Piece Offset with Door. This fixed component combines an approximately 100mm lateral offset with a built-in access door in the short lower pipe section.

The one-piece design replaces the separate bends and short pipe sections often needed to create a similar offset. Therefore, it reduces the number of visible joints and gives the completed installation a cleaner appearance.

Furthermore, the access door provides a practical point for inspection and chimney sweeping. The smooth matt-black finish also complements most traditional and modern stoves.

Product at a Glance

• Product type: fixed one-piece stove offset with access door
• Nominal diameter: 150mm (6 inches)
• Built-in lateral offset: approximately 100mm
• Access door position: short lower pipe section
• Lower connection: male or smaller-diameter end
• Material: 1.2mm zero-carbon steel
• Coating: internal and external vitreous enamel
• Approximate total finished thickness: 1.4mm
• Finish: smooth matt black
• Joint type: friction fit
• Temperature classification: T600
• Minimum distance from combustible materials: 450mm
• Model: 67-150-046
• EAN: 5060795860116
• Warranty: 12 years

Key Features

• Creates a fixed lateral offset of approximately 100mm
• One-piece construction for fewer visible joints
• Built-in door for sweeping and inspection
• Helps align the stove outlet with the vertical flue route
• 150mm nominal internal diameter
• Strong 1.2mm zero-carbon steel construction
• Internal and external vitreous enamel coating
• Smooth matt-black finish
• Friction-fit connection system
• Suitable for compatible gas, oil and solid-fuel appliances
• T600 temperature classification
• G450 combustible-clearance classification

Create a Neat Flue Offset

A stove outlet does not always sit directly below the chimney, flexible liner or twin-wall flue connection. In this situation, the built-in offset moves the connecting pipe sideways by approximately 100mm.

Normally, an installer may need two bends and one or more short pipe sections to create a similar offset. However, this component forms the offset in one piece. Consequently, the completed flue can look neater and less cluttered.

Fewer separate connections may also simplify installation and inspection. Nevertheless, always check the full product dimensions and the available installation space before ordering.

Why Choose an Offset with an Access Door?

An offset changes the direction of the flue route. As a result, soot and other combustion deposits may collect around the change in direction.

The built-in door gives a chimney sweep direct access to the inside of the component. It can help with:

• Routine chimney sweeping
• Inspection of the offset
• Removal of soot and loose debris
• Checking for tar or condensate deposits
• Examining the internal enamel coating

Position the door where it remains easy to reach after installation. In addition, make sure the stove, wall or another flue component will not block it.

Only open the access door when the appliance and flue system have cooled completely. Before using the stove again, close the door securely and check that it sits correctly.

One Piece Offset with Door vs Standard Offset

Feature	Offset with Door	Standard Offset
Lateral offset	Approximately 100mm	Approximately 100mm
One-piece construction	Yes	Yes
Built-in sweeping access	Yes	No
Best suited to	Routes that need access at the offset	Routes with cleaning access elsewhere

 

Choose this doored model when the offset provides the most practical point for inspection and cleaning. Alternatively, a standard offset may suit a system that already has suitable sweeping access nearby.

Why Choose VIT-Smooth?

VIT-Smooth offers a high-quality alternative to basic welded black stove pipe. The manufacturer carefully finishes the welded areas before applying the enamel. Consequently, the completed component has smooth joints and a clean appearance.

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

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

VIT-Smooth 150mm Offset with Door Specification

• Download the VIT-Smooth brochure
• Product type: fixed one-piece stove offset with access door
• Model and SKU: 67-150-046
• EAN: 5060795860116
• Nominal internal diameter: 150mm (6 inches)
• Built-in lateral offset: approximately 100mm
• Access door: included
• Access door position: short lower pipe section
• 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
• Joint type: friction fit
• Fuel compatibility: gas, oil and solid fuel
• Temperature classification: T600
• Standard: EN 1856-2
• Full classification: EN 1856-2 T600 N1 Vm L80120 G450
• Declared minimum distance from combustible materials: 450mm
• Manufacturer: Mi-Flues
• Range: VIT-Smooth
• Warranty: 12 years
• Country of manufacture: United Kingdom

Suitable Appliances and Flue Systems

You can use this offset 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 stove manufacturer will state the required flue diameter, temperature classification and permitted flue arrangement.

This component can form part of a connection 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 vitreous enamel offset forms part of a visible single-wall connecting flue. It creates a fixed sideways movement 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.

Planning the Flue Route

First, measure the sideways movement between the stove outlet and the vertical chimney connection. Next, check that the fixed 100mm offset matches the required alignment.

Also, make sure the access door will face a safe and reachable working area. The installer or chimney sweep must be able to open it without removing the stove or surrounding fireplace components.

Finally, allow for every joint overlap, adaptor and adjoining pipe section. The installer must also consider chimney draught, cleaning access and support for the complete system.

Correct Installation Direction

Install the offset with the male or smaller-diameter end pointing downwards towards the appliance. The upper female end should face towards the chimney.

This orientation helps keep condensates and combustion deposits inside the flue system. As a result, they remain within the pipe instead of escaping onto the outer surface of a joint.

Rotate the offset into the required position before securing the adjoining components. In addition, support the flue so it does not place excessive weight or sideways pressure on the offset or appliance outlet.

Jointing and Sealing

VIT-Smooth uses a friction-fit connection system. Therefore, connections between matching components do not normally require fire clay.

However, follow the instructions supplied with the appliance and complete flue system. If those instructions require a jointing compound, use only suitable fire cement or high-temperature silicone approved for the application.

Do not use ordinary household silicone because it may not withstand flue temperatures. Also, do not rely on sealant to correct a loose, damaged or incompatible connection.

Using the Access Door

Allow the appliance and flue to cool fully before opening the door. Next, protect the surrounding area from falling soot and debris.

Open the door carefully and use suitable sweeping or inspection equipment. Once the work is complete, clean the opening and close the door securely.

Before lighting the appliance again, check that:

• The door sits in its correct position
• The closure feels secure
• No debris blocks the opening
• The door and enamel show no damage
• The surrounding flue joints remain firm

Replace the component if the access door becomes damaged or cannot close securely.

Can You Cut the Offset?

Avoid cutting the shaped offset or its connection ends. Cutting may chip the enamel, expose the steel or prevent the component from forming a secure joint.

Instead, use compatible straight or adjustable pipe sections to achieve the required installation height. This approach keeps the factory enamel and connection profiles intact.

If the manufacturer permits an alteration, protect every exposed steel edge with suitable high-temperature paint. Furthermore, make sure the modified component still forms a safe connection.

Clearance from Combustible Materials

Maintain at least 450mm between this 150mm single-wall flue component and combustible materials. This clearance matches the product’s G450 classification.

Combustible materials may include:

• Timber frames and beams
• Wooden shelves and mantels
• Furniture and curtains
• Decorative wall coverings
• Materials hidden behind plasterboard

Plasterboard does not automatically make a wall non-combustible. For example, it may cover timber studs. Therefore, check the complete wall construction before confirming the clearance.

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

Installation Safety

Before installation, confirm that the 150mm diameter matches the appliance and every adjoining component. Also, check that the fixed offset suits the required flue route.

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

Always wear suitable gloves and eye protection when handling or installing metal flue components.

Inspection and Maintenance

Check the offset, access door and adjoining joints regularly. Look for movement, damaged enamel, staining, corrosion, distortion or signs of escaping combustion products.

In addition, arrange chimney sweeping at intervals that suit the appliance, fuel and frequency of use. Solid-fuel installations may need more frequent cleaning because soot and tar can collect inside the flue.

Only clean the external enamel after the component has cooled fully. 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 offset if it becomes badly damaged, corroded, distorted 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 this offset will suit your stove and flue route? Call the SNH Tradecentre team on 01843 842727 before ordering.

You can also read SNH Tradecentre customer reviews on Google.

Frequently Asked Questions

How much offset does this component provide?

The component provides a fixed lateral offset of approximately 100mm. Check the full dimensions and available installation space before ordering.

Where is the access door?

The built-in sweeping door sits in the short lower pipe section near the male end of the component.

What does the access door do?

The door provides direct access for inspection, chimney sweeping and the removal of soot or other combustion deposits.

Can I open the door while the stove is running?

No. Allow the appliance and complete flue system to cool fully before opening the door. Close it securely before using the stove again.

What diameter is the offset?

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

Is this offset adjustable?

No. This model provides a fixed offset of approximately 100mm. Choose the adjustable VIT-Smooth version if your installation needs extra vertical adjustment.

Can I use it with a wood-burning stove?

Yes, it suits many compatible wood-burning and multifuel stoves. However, confirm the required diameter and flue specification in the appliance instructions.

Can the offset pass through a wall or ceiling?

No. This is a single-wall connecting flue component. Use a suitable insulated chimney system for walls, ceilings, floors, roofs and concealed spaces.

How far must it remain from combustible materials?

The G450 classification declares a minimum clearance of 450mm. However, follow a greater distance if the appliance or another component requires one.

Does it need fire clay?

No. VIT-Smooth uses friction-fit joints, so fire clay is not normally required. However, follow the appliance and flue-system instructions regarding approved jointing compounds.

What does T600 mean?

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

What warranty does it include?

SNH Tradecentre lists a 12-year warranty. The manufacturer’s installation, use and maintenance conditions will apply.