Product Description

125mm Adjustable Stove Offset Pipe – VIT-Smooth Vitreous Enamel

Model: 67-125-047

The 125mm VIT-Smooth Adjustable Stove Offset Pipe combines a 100mm fixed sideways offset with up to 200mm of vertical adjustment. Therefore, it can solve two common flue alignment problems with one component.

The offset moves the flue route sideways. Meanwhile, the sliding lower pipe lets the installer adjust the final height. As a result, this fitting can connect a stove to an off-centre chimney route with fewer bends, short pipes and visible joints.

In addition, the smooth matt-black vitreous enamel finish matches most traditional and modern UK stoves. The fitting suits compatible wood-burning, multifuel, gas and oil appliances.

125mm Adjustable Stove Offset at a Glance

• Flue diameter: 125mm (5 inches)
• Fixed sideways offset: Approximately 100mm
• Length adjustment: Up to 200mm
• Adjustable section: Sliding lower pipe
• 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
• Model/SKU: 67-125-047
• EAN: 5060795860291

Key Features and Benefits

• Combines a fixed offset and adjustable pipe in one component
• Moves the flue route sideways by approximately 100mm
• Provides up to 200mm of vertical adjustment
• Helps align a stove outlet with the chimney connection
• Reduces the number of separate bends and pipes
• Creates fewer visible joints above the stove
• Helps produce a neat 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 finish
• Suits compatible wood-burning and multifuel stoves
• Also suits compatible gas and oil appliances

What Is an Adjustable Stove Offset Pipe?

An adjustable stove offset changes both the horizontal position and the installed height of a connecting flue.

First, the formed offset moves the flue route sideways by approximately 100mm. Next, the sliding lower section allows up to 200mm of height adjustment.

Therefore, this component can help when the stove outlet and chimney connection differ in both position and height. It also offers a cleaner alternative to using several separate bends and pipe sections.

However, the sideways offset remains fixed at approximately 100mm. Only the lower sliding section provides adjustment.

How Does the Adjustable Section Work?

The lower adjustable section slides inside a compatible 125mm pipe. The installer can move it further in or out to change the effective installed length.

As a result, the installer can adjust the height by up to 200mm. This makes it easier to align the offset with a chimney, flue-liner adaptor or twin-wall connection.

However, the installer must keep enough of the sliding section inside the receiving pipe. A joint with too little overlap may become weak or unsafe. Therefore, never extend the pipe beyond its permitted range.

Important: The adjustable end will not connect directly to every stove. Stove outlets can use different sizes and connection shapes. Therefore, you may also need a fixed pipe or suitable stove adaptor.

When Should You Use This Adjustable Offset?

This fitting 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 a standard pipe does not match the available height. In this case, the sliding lower section allows the installer to make the final adjustment without cutting several pipe sections.

For example, you may use this fitting for:

• Stove outlets that do not line up with the chimney centre
• Installations that need a 100mm sideways offset
• Flue routes that need up to 200mm of height adjustment
• Connections where a standard fixed pipe will not fit
• Replacement installations with compatible existing pipework
• Visible installations where fewer joints improve the appearance
• Connections leading towards a flexible flue liner
• Connections leading towards an insulated twin-wall chimney

However, do not use the fitting to avoid safety clearances. Also, never force two poorly positioned components together.

Adjustable Offset vs Fixed Offset

Feature	Adjustable Offset 67-125-047	Fixed Offset 67-125-045
Nominal diameter	125mm	125mm
Sideways offset	Approximately 100mm	Approximately 100mm
Length adjustment	Up to 200mm	No adjustment
Lower section	Sliding adjustable pipe	Short fixed pipe
Best use	Horizontal and vertical alignment	Fixed sideways alignment

Choose model 67-125-047 when you need both a 100mm offset and height adjustment. Alternatively, choose model 67-125-045 when the appliance and chimney heights already line up.

Why Choose a One-Piece Adjustable Offset?

A standard offset may need two bends, a short pipe and an adjustable length. However, each extra component adds another visible joint.

In contrast, this VIT-Smooth fitting combines the offset and adjustable pipe in one main component. Therefore, it offers several useful benefits:

• Fewer separate components to order
• Fewer visible flue joints
• A cleaner appearance above the stove
• Simple adjustment during installation
• Less need to cut standard pipes
• Easier alignment with an existing flue route
• A consistent 100mm offset

However, this component will not suit every flue route. For example, separate bends may work better when you need a different offset or angle.

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 component 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 both 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: Adjustable Stove Offset Pipe
• Brand: VIT-Smooth
• Model: 67-125-047
• EAN: 5060795860291
• Nominal diameter: 125mm (5 inches)
• Built-in sideways offset: Approximately 100mm
• Available length adjustment: Up to 200mm
• Adjustable section: Sliding lower pipe
• 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 with sliding connection
• 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

Suitable Appliances and Flue Systems

This 125mm adjustable stove offset 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 connection layout.

Planning the Installation

First, measure the horizontal distance between the stove outlet and the intended vertical flue route. Measure from the centre of one connection to the centre of the other.

Next, measure the available height between the appliance connection and the next fixed point in the chimney system. Then, check whether this height falls within the adjustment range.

In addition, check the full dimensional drawing. The overall height, joint depth and required overlap can all affect the final position.

Finally, make sure the completed flue will remain straight and supported. Do not use the adjustable pipe 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 appliance outlet
• The type of stove outlet or spigot
• Whether the installation needs a stove adaptor
• The required sideways offset
• The available installation height
• The correct receiving pipe for the sliding section
• The required joint overlap
• The connection needed at the chimney or liner
• The distance to nearby combustible materials

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

Correct Installation Direction

Place the adjustable section at the bottom and the formed offset above it. Then, connect the upper end towards the chimney system.

The male or smaller ends in the VIT-Smooth system should point downwards towards the stove. This layout helps keep condensates and deposits inside the flue.

However, do not turn the offset upside down to create another connection type. Instead, use the correct stove adaptor or connecting pipe.

Setting the Adjustable Length

First, slide the lower section into a compatible 125mm pipe. Then, move it until the offset reaches the correct height.

Keep both components straight while making the adjustment. Also, maintain the overlap stated in the latest manufacturer’s instructions.

Never overextend the sliding section. Too little overlap could weaken the joint or allow combustion gases to escape.

Likewise, do not force the pipe further into the receiving section. Excessive force may damage the enamel or distort the steel.

Finally, secure the connection with the method allowed by the appliance and VIT-Smooth instructions.

Jointing and Sealing

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

However, follow the current instructions for the sliding connection. Adjustable joints need enough overlap and a secure final position.

If the instructions allow it, you can apply suitable fire cement or high-temperature silicone for extra security. However, only use a product that suits the flue temperature and application.

Push fixed joints together fully. In addition, keep the components straight and avoid excessive force.

Can You Cut the Adjustable Offset?

First, use the available 200mm adjustment. In many cases, this will remove the need to cut another pipe.

However, cutting vitreous enamel can chip the coating and expose the steel. It may also remove a formed connection or reduce the overlap at the adjustable joint.

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

Never cut or change the shaped offset section. Instead, choose another approved combination of fittings if this product cannot provide the required alignment.

Important Installation and Safety Information

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

Never run this single-wall pipe 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 pipe 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.

Access for Inspection and Sweeping

This adjustable offset does not include an access door. Therefore, the flue system must provide another suitable cleaning point.

Changes in direction can make sweeping more difficult. As a result, the installer and chimney sweep should check that their equipment can reach every part of the flue.

For example, the installation may need an access-door pipe, access bend or tee with a removable cap.

In addition, keep the adjustable joint visible and accessible. Do not permanently box it in or hide it 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, sliding section and adjoining joints. Look for movement, corrosion, distortion or enamel damage.

Also, make sure the adjustable section has not moved. Then, check that the pipe still has enough support and clearance from combustible materials.

Use suitable chimney-cleaning equipment. Avoid abrasive cleaners or 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 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, 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 adjustable 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.

Read reviews from SNH Tradecentre customers on Google

Frequently Asked Questions

What is a 125mm adjustable stove offset?

It combines a 100mm fixed sideways offset with up to 200mm of height adjustment. Therefore, it can help align a stove with an off-centre chimney connection.

What diameter is this adjustable 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 sideways measurement.

How much height adjustment does it provide?

The sliding lower pipe provides up to 200mm of adjustment when it sits inside a compatible receiving pipe.

Does the 200mm adjustment change the sideways offset?

No. The sideways offset stays at approximately 100mm. The sliding section only changes the effective installed height.

How does the adjustable section work?

The lower section slides inside a compatible 125mm pipe. The installer sets the required height while keeping enough overlap between both components.

Can it connect directly to my stove?

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

How does it differ from the fixed offset?

Both models provide an approximately 100mm sideways offset. However, model 67-125-047 also provides up to 200mm of height adjustment. In contrast, model 67-125-045 uses a fixed lower section.

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 adjustable section at the bottom and the formed offset above it. Then, connect the upper end towards the chimney.

Can it pass through a wall or ceiling?

No. This single-wall connecting pipe 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 pipe 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 method of securing the adjustable section.

Can I cut the adjustable offset?

Use the available adjustment first. If the manufacturer allows cutting, protect any exposed steel with high-temperature paint. However, never cut the formed offset section.

Does it include a sweeping door?

No. This model does not include an access door. Therefore, the complete system must provide another suitable point for inspection and cleaning.

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.

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.