Product Description

125mm One Piece Stove Offset with Door – VIT-Smooth Vitreous Enamel

Model: 67-125-046

The 125mm VIT-Smooth One Piece Stove Offset with Door combines an approximately 100mm sideways offset with a built-in sweeping door. Therefore, it can change the flue position and provide cleaning access with one component.

The offset helps align a stove outlet with an off-centre chimney connection. Meanwhile, the access door allows a chimney sweep to inspect and clean the connecting flue.

In addition, the one-piece construction reduces the number of bends, pipes and visible joints above the appliance. Its smooth matt-black enamel finish also matches most traditional and modern UK stoves.

125mm Stove Offset with Door at a Glance

• Flue diameter: 125mm (5 inches)
• Sideways offset: Approximately 100mm
• Cleaning access: Built-in sweeping door
• Door position: Short lower pipe section
• Lower connection: Male end
• Material: 1.2mm zero-carbon steel
• Finish: Matt-black vitreous enamel
• Fuel suitability: Gas, oil and solid fuel
• Temperature classification: T600
• Product standard: EN 1856-2
• Product designation: EN 1856-2 T600 N1 Vm L80120 G375
• Distance from combustibles: 375mm
• Warranty: 12 years, subject to terms
• Model/SKU: 67-125-046
• EAN: 5060795860307

Key Features and Benefits

• Combines a 100mm offset and sweeping access in one fitting
• Helps align a stove with an off-centre chimney connection
• Includes a built-in access door in the lower pipe section
• Allows easier flue inspection and chimney sweeping
• Reduces the number of separate bends and pipes
• Creates fewer visible joints above the stove
• Helps produce a clean and professional finish
• Works with compatible 125mm VIT-Smooth components
• Uses strong 1.2mm zero-carbon steel
• Includes internal and external vitreous enamel
• Features a smooth matt-black surface
• Suits compatible wood-burning and multifuel stoves
• Also suits compatible gas and oil appliances
• Includes a 12-year warranty, subject to the manufacturer’s terms

What Is a One Piece Stove Offset with Door?

A stove offset moves the connecting flue sideways when the appliance outlet and chimney connection do not share the same centre line.

On this model, the formed offset moves the flue route sideways by approximately 100mm. In addition, the short lower pipe includes a built-in sweeping door.

Therefore, the fitting solves two common installation needs. First, it changes the flue position. Secondly, it provides access for inspection and cleaning.

Without this combined fitting, the installation may need separate bends, a short pipe and an access-door component. As a result, the one-piece offset can reduce the number of visible joints.

What Is the Sweeping Door Used For?

The built-in door gives a chimney sweep access to the inside of the connecting flue. Therefore, it can make inspection and cleaning easier.

The door sits in the short lower pipe section, close to the male end. This position helps provide access below the formed offset, where cleaning equipment may otherwise struggle to reach.

For example, a chimney sweep may open the door to:

• Inspect the inside of the connecting pipe
• Insert suitable chimney-cleaning equipment
• Remove soot and other deposits
• Check the flue after a blockage
• Inspect the change in direction

However, the door does not guarantee access to every part of the chimney. The installer and chimney sweep must confirm that they can reach the complete flue route.

When Should You Use This Stove Offset?

This component can help when a stove sits centrally on a hearth but the chimney connection sits approximately 100mm to one side.

It can also help when the offset creates a change in direction that needs cleaning access. Therefore, it offers a useful solution for visible stove-pipe installations.

Typical uses include:

• Stove outlets that do not line up with the chimney centre
• Installations that need an approximately 100mm offset
• Flue routes that require access for sweeping
• Visible installations where fewer joints improve the finish
• Connections leading towards a flexible flue liner
• Connections leading towards a masonry chimney
• Connections leading towards an insulated twin-wall system
• Wood-burning and multifuel stove installations

However, do not use the offset to avoid safety clearances. Also, never force poorly aligned components together.

Offset with Door vs Standard Offset

Feature	Offset with Door 67-125-046	Standard Offset 67-125-045
Nominal diameter	125mm	125mm
Sideways offset	Approximately 100mm	Approximately 100mm
Sweeping door	Yes	No
Lower section	Short pipe with access door	Short fixed pipe
Best use	Offsets that also need cleaning access	Offsets with access available elsewhere

Choose model 67-125-046 when the flue route needs both an offset and a cleaning point. Alternatively, choose model 67-125-045 when the system already provides suitable access elsewhere.

Why Choose a One-Piece Offset?

A standard offset may need two bends and a short connecting pipe. Furthermore, the system may need another pipe with an access door.

In contrast, this fitting combines the offset and sweeping door in one component. Therefore, it offers several useful benefits:

• Fewer separate components to order
• Fewer visible flue joints
• A cleaner appearance above the appliance
• Built-in access for inspection
• Easier access for chimney sweeping
• Less time spent aligning separate bends
• A consistent manufactured offset

However, the fixed 100mm offset will not suit every installation. For example, separate bends may work better when you need a different sideways movement.

Why Choose VIT-Smooth?

VIT-Smooth combines strong steel with an attractive matt-black enamel finish. As a result, it provides both strength and a clean appearance.

During production, the manufacturer carefully finishes and smooths the welded areas before adding the enamel. Therefore, the finished fitting has less visible weld lines than many standard black stove pipes.

The manufacturer uses 1.2mm zero-carbon steel and adds approximately 0.2mm of powder vitreous enamel. Together, these layers create an approximate total thickness of 1.4mm.

Furthermore, the enamel covers the inside and outside of the component. It helps protect the steel against heat, combustion gases and corrosive deposits.

Finally, the deep matt-black finish matches other VIT-Smooth pipes, bends, tees and adaptors. It also complements most traditional and modern stoves.

Technical Specification

• Product: One Piece Stove Offset with Door
• Brand: VIT-Smooth
• Manufacturer: Mi-Flues
• Model: 67-125-046
• EAN: 5060795860307
• Nominal diameter: 125mm (5 inches)
• Built-in sideways offset: Approximately 100mm
• Access: Built-in sweeping door
• Door position: Short lower pipe section
• Material: Zero-carbon steel
• Steel thickness: 1.2mm
• Enamel thickness: Approximately 0.2mm
• Total finished thickness: Approximately 1.4mm
• Coating: Powder vitreous enamel
• Coating position: Internal and external
• Colour: Matt black
• Joint type: Friction fit
• Fuel compatibility: Gas, oil and solid fuel
• Temperature classification: T600
• Maximum continuous temperature classification: 600°C
• Product standard: EN 1856-2
• Full designation: EN 1856-2 T600 N1 Vm L80120 G375
• Distance from combustibles: 375mm
• Warranty: 12 years, subject to terms

Suitable Appliances and Flue Systems

This 125mm stove offset with door suits compatible:

• Wood-burning stoves
• Multifuel stoves
• Gas heating appliances
• Oil-fired appliances
• 125mm VIT-Smooth connecting pipes
• Flexible flue-liner connections
• Masonry chimney connections
• Insulated twin-wall chimney systems

However, always check the appliance instructions before ordering. The appliance manufacturer must allow the 125mm flue diameter and proposed layout.

Planning the Installation

First, measure the sideways distance between the stove outlet and the intended chimney route. Measure from the centre of the appliance outlet to the centre of the vertical flue connection.

Next, check the available height above the appliance. The overall height of the fitting, connection depth and position of the access door can all affect the final layout.

In addition, allow enough room in front of the sweeping door. A chimney sweep must have enough space to open the door and insert suitable cleaning equipment.

Do not place the access door against a wall, appliance panel or another obstruction. Also, do not hide it inside a closed enclosure.

Finally, make sure the completed flue remains straight and properly supported. Do not use the offset to pull a badly positioned chimney connection into place.

Checking Appliance Compatibility

A 125mm stove outlet will not always accept every 125mm flue component. For example, stove spigots can use different internal sizes, external sizes and joint shapes.

Therefore, check the following details before ordering:

• The flue diameter stated in the appliance instructions
• The exact size of the stove outlet
• The type of appliance spigot
• Whether the installation needs a stove adaptor
• The required sideways offset
• The available height above the appliance
• The position and access space for the sweeping door
• The required chimney or liner connection
• The distance to combustible materials

Furthermore, never reduce the flue diameter unless the appliance manufacturer and current regulations allow it.

Correct Installation Direction

Place the short pipe and access door at the bottom. Then, connect the upper end towards the chimney system.

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

However, do not turn the fitting upside down to create a different connection. Instead, use the correct stove adaptor or connecting pipe.

In addition, position the sweeping door so a competent person can reach it safely. Keep enough room around the door for future inspection and cleaning.

Using the Sweeping Door Safely

Always keep the sweeping door fully closed while the appliance operates. An open or loose door could allow smoke and harmful combustion gases to enter the room.

Before opening the door, allow the stove and flue to cool fully. Hot soot, ash and metal surfaces can cause serious burns.

Next, protect the area below the door because loose soot may fall from the pipe. Then, open the door with the correct tool and use suitable cleaning equipment.

After cleaning, remove loose deposits from the door and opening. Finally, close and secure the door before using the appliance again.

Do not use the stove if the door, fastener or sealing surface shows damage. Instead, replace or repair the affected part first.

Jointing and Sealing

VIT-Smooth components use close-fitting friction joints. Therefore, they do not need fire clay for standard assembly.

However, always follow the current VIT-Smooth and appliance instructions. If the instructions allow it, you can apply suitable fire cement or high-temperature silicone for extra joint security.

Only use a jointing product that suits the flue temperature and intended application. In addition, push each joint together fully and keep the components straight.

Do not seal the access door permanently. The door must continue to open for inspection and chimney sweeping.

Can You Cut the Offset with Door?

Choose a compatible fixed or adjustable pipe before cutting this component. Cutting vitreous enamel can chip the coating and expose the steel.

In addition, cutting may remove a formed connection or damage the sweeping-door section. Therefore, never cut through the door, its frame or the shaped offset.

If the manufacturer allows cutting in a plain pipe section, protect every exposed steel edge with suitable high-temperature stove paint. Also, remove sharp edges and check that the altered component still creates a secure connection.

If this fitting does not suit the available space, choose another approved combination of components.

Important Installation and Safety Information

Use this VIT-Smooth offset only as a single-wall connecting flue. It should connect a compatible appliance to a chimney, flexible liner or insulated twin-wall system.

Never run this single-wall fitting through a wall, ceiling, floor, roof, cupboard or concealed space. Instead, use a suitable insulated chimney system wherever the flue passes through the building.

Keep at least 375mm between the fitting and combustible materials. For example, combustible materials may include timber, furniture, wall finishes and some plasterboard structures.

Do not assume that plasterboard provides a non-combustible barrier. It may cover timber battens or another combustible structure.

Furthermore, follow any greater clearance stated in the appliance instructions. The highest clearance requirement always takes priority.

The stove outlet must not carry the full weight of the chimney. Therefore, use suitable supports to prevent excess downward or sideways force.

Finally, ask a competent installer to design and fit the system. For solid-fuel work, consider using a HETAS-registered installer. Alternatively, contact Building Control where required.

Inspection and Chimney Sweeping

The built-in door provides useful access near the offset. However, it may not provide access to every part of the chimney.

Therefore, the installer and chimney sweep should check the complete flue route. They must make sure their equipment can reach every section that needs cleaning.

Depending on the layout, the system may need another access door, removable tee cap or cleaning point.

In addition, keep the offset and door visible. Do not permanently box them in or place them inside a closed space.

Cleaning and Maintenance

Arrange regular chimney inspection and sweeping. The correct frequency will depend on the appliance, fuel, level of use and chimney condition.

During each inspection, check the formed offset, access door and adjoining joints. Look for movement, corrosion, distortion or enamel damage.

Also, check the door fastener and closing surface. The door must close securely before the appliance operates.

Use suitable chimney-cleaning equipment. Avoid abrasive tools because they may scratch or chip the enamel.

Finally, replace any component that becomes badly damaged, corroded or insecure. Stop using the appliance if smoke or combustion gases escape from the door or a joint.

Product Guide

• Download the VIT-Smooth brochure

Why Buy from SNH Tradecentre?

• Competitive prices: We offer excellent value across our stove, chimney and flue range.
• Helpful advice: Our team can help you compare offsets, bends, access pipes and adaptors.
• Genuine products: Buy from an established plumbing and heating merchant.
• Matching components: Choose from a wide range of 125mm VIT-Smooth products.
• Local collection: Collect eligible stock from our Birchington trade counter.
• UK delivery: Select from the delivery options available at checkout.
• Trade and public welcome: We supply installers, homeowners, landlords and property professionals.
• Customer support: Contact us before or after buying your flue components.

Need help checking whether this offset suits your stove? Call SNH Tradecentre on 01843 842727. If possible, have the stove make, model, outlet size, required offset and available height ready.

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Frequently Asked Questions

What is a 125mm stove offset with door?

It combines an approximately 100mm sideways offset with a built-in sweeping door. Therefore, it can change the flue position and provide cleaning access with one component.

What diameter is this offset?

It has a nominal diameter of 125mm, which equals approximately five inches. It works with compatible 125mm VIT-Smooth components.

How much sideways offset does it provide?

The formed section moves the flue route sideways by approximately 100mm. However, you cannot adjust this measurement.

Where is the sweeping door?

The door sits in the short lower pipe section near the male end. Therefore, it provides access below the formed offset.

What does the sweeping door do?

It provides access for flue inspection and chimney sweeping. It can also help a chimney sweep remove soot and other deposits.

Can I use the stove with the door open?

No. Always close and secure the door before lighting the appliance. Otherwise, smoke and harmful combustion gases could enter the room.

Does the door provide access to the whole chimney?

Not always. It provides access near the offset. However, the installer and chimney sweep must confirm that they can reach every part of the complete flue.

Can it connect directly to my stove?

Not always. Stove outlets can use different sizes and joint shapes. Therefore, you may need a suitable stove adaptor or connecting pipe.

How does it differ from the standard offset?

Both models provide an approximately 100mm sideways offset. However, model 67-125-046 includes a sweeping door, while model 67-125-045 does not.

Can I use it with a wood-burning stove?

Yes, you can use it with compatible wood-burning and multifuel stoves. However, always check the appliance instructions before ordering.

Can I use it with gas or oil appliances?

Yes, it also suits compatible gas and oil appliances. Nevertheless, the appliance instructions must allow the proposed flue size and layout.

Which way up should I install it?

Place the access-door section at the bottom and point the male end towards the appliance. Then, connect the upper end towards the chimney.

Can it pass through a wall or ceiling?

No. This single-wall fitting must not pass through walls, ceilings, floors, roofs or concealed spaces. Instead, use a suitable insulated chimney system.

How far must it remain from combustible materials?

Keep at least 375mm between the fitting and combustible materials. However, follow a greater distance if the appliance instructions require one.

Does the joint need fire clay?

No. VIT-Smooth uses friction-fit joints. However, follow the current instructions for any approved sealant or jointing compound.

Can I cut the offset?

Avoid cutting where possible. Never cut the door, door frame or formed offset. If the manufacturer allows cutting in a plain section, protect the exposed steel with high-temperature paint.

What is the maximum operating temperature?

The component carries a T600 classification. Therefore, it has a maximum continuous operating-temperature classification of 600°C.

What does G375 mean?

The letter “G” shows soot-fire resistance. Meanwhile, 375 states the declared distance from combustible materials in millimetres.

Does the product include a warranty?

Yes. SNH Tradecentre lists this VIT-Smooth component with a 12-year warranty, subject to the manufacturer’s terms and correct installation.

Who should install this stove offset?

A competent installer should fit the component. For solid-fuel installations, use a HETAS-registered installer or contact Building Control where required.

Manufacturers can update dimensions and installation instructions. Therefore, check the latest VIT-Smooth literature and confirm appliance compatibility before ordering.