Product Description

125mm VIT-Smooth 90° Fully Swept Vitreous Enamel Elbow

Model: 67-125-030

The 125mm VIT-Smooth 90° vitreous enamel elbow creates a right-angle change of direction within a compatible 125mm single-wall connecting flue. Its smooth three-segment construction produces a more gradual internal route than a sharply fabricated square bend.

Made from 1.2mm zero-carbon steel, the elbow features a powder vitreous enamel coating on its internal and external surfaces. Therefore, it provides a strong, heat-resistant component with an attractive matt black finish.

However, a 90-degree change of direction can restrict flue flow and make sweeping more difficult. A competent installer must confirm that the appliance instructions, chimney design and current regulations permit this component in the proposed position.

125mm VIT-Smooth 90° Elbow Features

• 125mm (5-inch) nominal flue diameter
• Fixed 90-degree change of direction
• Smooth three-segment elbow construction
• Manufacturer model number: 67-125-030
• Designed for compatible VIT-Smooth connecting flues
• Made from 1.2mm zero-carbon steel
• Approximately 0.2mm powder vitreous enamel coating
• Approximately 1.4mm total thickness, including enamel
• Internal and external enamel finish
• Heat-resistant matt black colour
• Friction-fit connections
• Suitable for compatible gas, oil and solid-fuel appliances
• Maximum continuous operating temperature: 600°C
• Product designation: EN 1856-2 T600 N1 Vm L80120 G375
• Minimum declared distance from combustible materials: 375mm
• Manufactured in the UK
• 12-year warranty, subject to the manufacturer’s terms

Technical Specification

• Product type: Single-wall flue elbow
• Nominal diameter: 125mm (5 inches)
• Angle: 90°
• Construction: Three-segment smooth elbow
• Material: Zero-carbon steel
• Steel thickness: 1.2mm
• Enamel thickness: Approximately 0.2mm
• Total thickness: Approximately 1.4mm
• Coating: Powder vitreous enamel
• Colour: Matt black
• Joint type: Friction fit
• Temperature classification: T600
• Product standard: EN 1856-2
• Distance from combustibles: 375mm
• Warranty: 12 years, subject to terms
• EAN: 5060795860369
• Model: 67-125-030

What Is a 90° Flue Elbow Used For?

This elbow allows a compatible 125mm connecting flue to change direction by 90 degrees. It may suit certain appliance connections or chimney arrangements where the approved design requires a right-angle change.

Nevertheless, the shortest and most vertical flue route generally supports better natural draught. A 90-degree elbow should not be added merely for convenience when a straighter or more gradual route is available.

The installer must check the product dimensions when calculating the horizontal displacement and installed height. Do not rely on the nominal diameter or angle alone when setting out the complete system.

What Does Fully Swept Mean?

The elbow uses three formed segments to create a smoother internal change of direction. Consequently, the flue gases follow a more gradual curve than they would through a sharp square corner.

However, “fully swept” does not mean that the bend has no effect on draught or chimney cleaning. Any 90-degree change introduces resistance and requires careful consideration within the complete flue design.

Important Guidance for Solid-Fuel Installations

Solid-fuel connecting flues should follow the appliance instructions and remain as short, direct and vertical as reasonably possible. Some arrangements may not permit a standard 90-degree elbow.

Where a rear appliance outlet needs to turn upwards, a suitable 90-degree tee with a removable cap may provide better sweeping access than a closed elbow. Alternatively, an elbow with an integral access door may suit some approved designs.

A competent installer must choose the appropriate component. Do not assume that this elbow is suitable solely because the pipe and appliance outlet both measure 125mm.

Why Choose VIT-Smooth?

VIT-Smooth combines strong steel construction with a smooth vitreous enamel finish. The welds are designed to remain discreet, while those on the bends are ground smooth to create a clean and professional appearance.

Furthermore, the internal and external enamel coating helps protect the steel against heat, combustion gases and corrosive deposits. The matt black finish also complements many traditional and contemporary stoves.

Suitable Applications

• Compatible wood-burning stoves
• Compatible multifuel stoves
• Suitable gas heating appliances
• Suitable oil-fired appliances
• 125mm VIT-Smooth connecting-flue systems
• Approved right-angle changes of direction
• Visible single-wall stove-pipe installations
• Connections leading towards a suitable chimney system

Choosing Between an Elbow and a Tee

A closed 90-degree elbow changes the flue direction but does not include a built-in cleaning opening. A tee with a removable cap may provide direct access at the base of a vertical flue, making inspection and sweeping easier.

An elbow with an access door offers another option where the system design permits it. Before ordering, ask the installer which component provides the correct flue route and required cleaning access.

Installation Direction

Install the elbow with the smaller or male end pointing downwards towards the appliance. This orientation helps keep condensate and combustion deposits inside the flue system.

Ensure both joints engage fully and remain mechanically secure. Do not reverse the component or force together parts with incompatible joint profiles.

Jointing and Sealing

Compatible VIT-Smooth components use close-fitting connections. Therefore, fire cement is not automatically required between every correctly assembled joint.

However, the appliance and flue manufacturers determine the approved sealing method. Only use suitable fire cement, high-temperature sealant or another jointing product when the current instructions permit it.

Do not use sealant to compensate for an insecure, damaged or poorly fitting joint. The components must engage correctly before the installer completes any permitted sealing.

Installation and Safety Information

Use VIT-Smooth only as a single-wall connecting flue between a compatible appliance and a suitable chimney, flexible liner or insulated twin-wall system. Never use this elbow to pass through a wall, ceiling, roof or concealed void.

Maintain at least the declared 375mm distance from combustible materials. These may include timber, furniture, combustible wall finishes and some plasterboard constructions. Follow any greater clearance stated by the appliance manufacturer.

The elbow must not support the weight of a flexible liner or chimney system. Use suitable supports and system components so the joints and appliance outlet do not experience damaging loads.

A competent installer should design and fit the complete system. For solid-fuel work, use a suitably qualified installer, such as a HETAS-registered installer, or notify Building Control where required.

Finally, follow the appliance instructions, current VIT-Smooth guidance and applicable Building Regulations. The appliance manufacturer’s requirements determine the permitted flue diameter, number of bends and complete route.

Inspection and Sweeping Access

A 90-degree elbow can make chimney inspection and sweeping more difficult. Therefore, the complete installation must include suitable access unless the appliance or another removable component already provides an adequate cleaning route.

Do not install the elbow where deposits can collect without a practical method of removal. An access-door elbow or tee-and-cap arrangement may be more appropriate in some positions.

A competent person should inspect and clean the chimney regularly. The required frequency depends on the appliance, fuel, level of use and chimney condition.

Care and Maintenance

Use suitable sweeping equipment that will not damage the vitreous enamel surface. Avoid mild-steel tools that could scratch or contaminate the finish.

During maintenance, check the elbow for movement, distortion, corrosion, enamel damage and insecure joints. Replace any component that no longer remains safe or serviceable.

Product Guide

• Download the VIT-Smooth brochure

Why Buy from SNH Tradecentre?

• Competitive prices: We aim to offer excellent value across our flue and chimney range.
• Helpful advice: Our team can help you compare elbows, tees and access components.
• Genuine products: Order from an established plumbing and heating merchant.
• Collection available: Collect eligible in-stock products from our Birchington trade counter.
• UK delivery: Choose from the available delivery services at checkout.
• Trade and public welcome: We supply installers, homeowners, landlords and property professionals.

Need help deciding between an elbow and a tee? Call SNH Tradecentre on 01843 842727 before ordering. If possible, have the appliance model, outlet position and proposed flue route ready.

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Frequently Asked Questions

What diameter is this VIT-Smooth elbow?

It has a nominal diameter of 125mm, equivalent to approximately five inches. It is designed for compatible 125mm VIT-Smooth connecting-flue components.

What angle does the elbow create?

It changes the flue direction by 90 degrees. The installer must confirm that the complete chimney design permits such a change of direction.

How is the elbow constructed?

It uses three formed segments to create a smooth 90-degree bend. This produces a more gradual route than a sharp square corner.

Can I fit it to the rear outlet of a stove?

Only when the appliance instructions and complete design permit it. A tee with a removable cap may be more appropriate because it can provide access for sweeping at the base of the vertical pipe.

Does this elbow have a cleaning door?

No. Model 67-125-030 is the standard closed elbow. If cleaning access is needed at the bend, consider the compatible access-door version or another approved arrangement.

Can I use this elbow with a wood-burning stove?

It may suit a compatible wood-burning or multifuel appliance. However, the installer must check the permitted flue layout, draught requirements and sweeping access.

Will a 90-degree elbow affect chimney draught?

It can. Every bend creates resistance to flue-gas flow, and a 90-degree change has a greater effect than a shallower bend. The installer must assess the complete chimney design.

Which way up should the elbow be installed?

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

What is the maximum operating temperature?

The elbow carries a T600 classification. Therefore, its maximum continuous operating temperature is 600°C. Always observe any lower limit specified by the appliance manufacturer.

Can this elbow pass through a wall or ceiling?

No. It is a single-wall connecting-flue component and must not pass through walls, ceilings, roofs or concealed spaces.

How far must it be from combustible materials?

The product designation declares a minimum distance of 375mm from combustible materials. However, the installer must observe any greater clearance required by the appliance or current regulations.

Does the joint require fire cement?

Not automatically. Compatible VIT-Smooth parts use close-fitting connections. Only apply an approved jointing product when the current appliance and flue instructions require or permit it.

Who should install this 90-degree flue elbow?

A competent installer should fit it as part of a properly designed chimney system. For solid-fuel installations, consider using a HETAS-registered installer or arranging Building Control notification where required.

Manufacturers may update specifications and installation guidance. Therefore, check the latest VIT-Smooth literature and confirm that the proposed 90-degree change is permitted before ordering.